I have changed my opinion since this thread was made! Originally, i loved geometry dash's soundtrack even though it wasn't really a soundtrack and really a collection of songs on youtube gotten with permission. From them, i've changed my favorite soundtrack to doom II. with my favorite music track being "Into Sandy's City"

Final fantasy 7, 9, 10. 10-2 and 13. Crash bandicoot 2 I am just going to leave it like that lol since those ones are my absolute fav ones to listen to most of the time. These games have an amazing soundtrack that I can not describe in words. All I can say is that if you have not listened to them give it a go by doing that. ^^

Spiral Knights has to have my favorite VGM soundtrack of all time.  It tends to draw you in deeper to the game (like any good soundtrack should, really) and combining that with both the game's storyline and the fact that you can see the world you're exploring change in the background, it really gives off a sort of desolate feel at times.

Oh, geez, this is such a tough one to answer. There are just so many good VGM soundtracks out there that I would gladly listen to. Even listing a number of ones I like a cut above the rest is super difficult, but I could try!

Mario Kart 8 - Complain as you might of its roster, tracks, and item roulette (which is one of the dumbest in the series; why is second allowed to get triple red shells?!), but you can't diss this game's score of music. I know for certain that this wouldn't be my absolute favorite, but most of its OST is that kind of instrumental music that you'd listen to in the car (both F-Zero remixes are probably the best of them to listen to, preferably on the highway). It gets plenty of bonus points for being true instrumental recording, or at least for some of the score.

Any Kirby game - Am I biased? Absolutely I am. However, I think I speak for most people when I say that there's one thing the HAL Laboratory has never dropped the ball on so far with their cute, pink mascot, and that is the series OST. I don't think there's ever been a person I've talked to who doesn't respect its musical score, even if it's another person coming to tell me how much of a four year old girl I supposedly am for playing such a children's game. Look at all of the notable pieces of Kirby's OST; it covers a lot of genres overall, and I think everyone will find at least one song they enjoy a lot. As someone who enjoys almost every genre of music, almost the same, this is a soundtrack I adore beyond comprehension. Whether it's Dreamland's timeless firsts, or the 20th unique rendition of those tracks, I'll always enjoy the sounds of the adorable puffball of HAL.

Metroid Prime/Super Metroid - While technically a tie, I've included both of these defining Metroid games more so due to the similarities they seem to share overall in their soundtracks, but regardless, they are both equally amazing to me. If there's one thing Metroid has always gotten right with in its score, it would be setting the atmosphere. They know how to control your emotions throughout the game with their OST, and hold nothing back in these two games. Look at Super Metroid's start, when landing on Zebes once again. Before the Space Pirates show up, what does that initial music tell you? You're alone, on a planet that was once thriving and teeming with life, a planet that you were raised on. Now it's barren and empty, with not even an enemy to find (that is, until you get the morph ball and missile). Look at Lower Norfair, a track that both Super Metroid and Metroid Prime share. It also fits the mood it's supposed to meet. As far as ambient music goes, Metroid has your number on that. Maybe it's not drive-in-the-car music, but it's still very enjoyable.

Sonic Adventure/Sonic Adventure 2 - I'll keep this one short. Open Your Heart, It Doesn't Matter, Escape From the City. Live and Learn. Need I say any more? The people at Sonic Team clearly knew what they were doing with the soundtrack of these two games, shown by the number of memorable tracks (including the four most noted that I mentioned). Although the raps were dumb during the Knuckles stages, this is one of the few times I can ignore the obvious attempt to modernize the soundtrack through that.

Keep in mind that there are many, many more I'd like to include on here. But these are the ones that I was able to think of on the fly.

My favorite VGM soundtrack, weird as it sounds, has to go to Sonic 06. It may be a bad game in terms of game play, but the music, like His World, the acoustic version of the chorus of His World at the Results Screen, Solaris Phase 2, and Dreams of an Absolution are all really great. The levels like Wave Ocean and Crisis City are some of the best level musics in the Sonic series, but it is unfortunately all plagued by bad game play.

I have to add Undertale to my list, its easily one of the best OST's that I have ever heard. There's only a couple games where you consistently like many of the songs in a game and this is one od them because instead of having a bunch of ok and decent songs and a few good ones, this one is packed full of great ones.

You know, I created a forum specially for such discussions: https://www.vizzed.com/boards/forum.php?id=87 Feel free to review soundtracks if you want too

I really like the Pokemon Mystery Dungeon soundtracks. Especially "I Don't Want To Say Goodbye". Or rather, any Pokemon soundtrack in general, I find most have really good songs.

Starcraft. Not that much in the way of soundtracks, but it could just be a ton of hours playing it that has engraved the songs in my head and I really like it.

Team Fortress 2. Same as above. Rocket Jump Waltz is amazing.

My favorite soundtrack is probably a toss up between Legend of Mana and Symphony of the Night.
The whole soundtrack for both of those OSTs is great.

Easily the entirety of the Bravely Default soundtrack. Not surprising, given it was composed by the same band who did both Attack on Titan openings. Every city has its own unique track that suits the nature of the place perfectly. Special mention must go to "He of the Name...," the standard boss battle music and "Serpent Eating the Ground," the final boss battle music.

Mine are Sonic Adventure DX I think there is so much variety in that soundtrack and Super Mario 64 I just love every song in that game

I don't think I could pick just one, so I'm going to say Final Fantasy 7, 8, 9, 10, and 13. The music in those games is incredible. Almost every track is perfect for what it applies to. The new Video Game Music feature on the site has brought back so many great memories. I find myself using it more and more often.