My First episode was "The Ticket Master" It is when I fell in love with the show, I instantly found Pinkie Pie saying "And I was like Oatmeal are you crazy" to be one of the best lines I had ever heard, ever. 

 my favorite episode was too many pinkie pies and but wasnt my first 

The first episode I watched was the first in the series.
I was watching it mostly because I wanted to see if it was any good and then I started liking it and I watched several in a row.

My first episode that I watched was the 2 part Friendship is Magic pilot episode, as it was right after Equestria Girls that I started watching the show. I thought it was really good for a pilot episode and overall a good episode in Season 1 in general.

The very first episode which I watched I think around a year ago or something like that. Mainly because I thought all MLP fans online were trolls at the time and I decided to watch it and ended up binge watching episodes. Nowadays I don't watch MLP nearly as much as I used to (probably because all the parodies, memes and stuff made me kind of overdose on it if that even makes any sense lol) but I might watch them occasionally if I feel bored. Nowadays I mostly just watch parodies and other stuff instead of actual episodes.

The first episode I watched was Friendship is Magic part 1. I didn't even noticed it was a two-part episode until I saw To Be Continued... at the end of the video. I only meant to check out one episode "to see what all the fuss is about."

If we are on about My little pony:Friendship is magic then i literally just stumbled upon the first episode on youtube one day and there really was not that much hype about the show at the time, Little did i know at the time that it would become this huge thing and that other people would be interested in it. Or that i would own a forum on vizzed to do with it either, 

When i was a lot younger i did watch some of the older generations of My little pony, as i had an older sister and at the time i think she really liked them. I can not really recall what episode i watched first or what generation it was either , because my memory sucks i am afraid. 

Either way Generation 4 is a lot better!

I watched a couple of episodes back in like 85' or something like that.  I think it is a different version than the one most people refer to nowadays though.  As for specific episodes my memory is not good enough for such an arduous task.

I watched Season 1: Episode 1 first, I believe, after seeing some clips. I really just flipped around and didn't watch the whole thing at first. When it got to the part where they started singing, I was alternating between "this is stupid" and "well this is a good show, but I don't like it".

Later, I saw Lesson Zero. That episode nearly singlehandedly got me to change my mind about the show. Since then, I've been more open to watching other episodes all the way through and am patient enough to do so. If I ever have girls, I will show them this show, and I will have an excuse AND a reason to watch it. And it will be way more fun than watching it on my own.

G4S1E1 was my first. Favorite, umm, well my least favorite S1E1, I know that (because the first episode is always the hardest to sit through).

EDIT: Found my favorite, S1E9, Fluttershy's voice was hularious!

i actually first watched the Discord episodes in I think season 2? I was seeing the ponies all over hte place, but when John delancy took part my Trekky dom made me give in and watch. 
I did, and I loved it XD
then I went back and watched most of season 1 and 2, I might have seen them all but im pretty sure im missing things.  My fave characters have been Fluttershy and Twilight for the longest time. Twilight gained super aproval with teh First episode.
"Everyone in this town is CRAZY!"  I liked seing a character who used both magic and Mass amounts of logic as well.  Magic used in conjunction with Science and logic was just excellent.
Fluttershy is just so dam adorable, and teh fact they have a peace keeper in the party that is also pretty logical is fantastic.  the fact she worked as a VET to top it all off was epic.  
"Yes. Because he wasn't a huge, gigantic, terrible, enormous,
teeth-gnashing, sharp scale-having, horn-wearing, smoke-snoring,
could-eat-a-pony-in-one-bite, totally-all-grown-up dragon.
"
that made me laugh and think.  "YES another pony with some SENSE!  WHOO HOO id be scared of that stuff too."

My first episode was S1E1, after which I spent the next 8 hours watching episode after episode, and as for a favorite episode, there can be a favorite?

Now what led me personally to it was general curiosity of "What is all this hype about?" since I, being me, don't judge things based on what I hear but rather what I see or experience myself (Twilight included *shudder* but that is for another topic, as it is another whole deal on it's own).

My first was "Dragonshy" and it was my favorite episode until I saw "Return Of Harmony" Solely because that episode introduced Discord.