So, What is your favorite wisp, there are many choices and many colors. My favorite is rocket because of the pure power you can see when sonic uses it. 
 


 Here is a little more info on the Wisps themselves: 
 
 Red: red wisps turn sonic into a fiery flame ball that can burn through almost anything, they are known to be lively and energetic

 Orange: Orange wisps turn Sonic into a rocket that can blast him into the sky very quickly,they are known to be emotional wisps, that are easily affected by the attitudes of others. 
 
 Yellow: The yellow wisp will let Sonic drill through both land and water, they are fond of land and water alike 
 
 Green: this wisp makes sonic fly in the air like a UFO, they can also light dash through rings in a row. They are goofy wisps that like the air 
 
 Blue: Blue wisps turn sonic into a cube temporarily to smash the ground and turn blue cubes into blue blocks and visa versa, smashing into the ground also will destroy all nearby enemies and blocks. The blue wisp is known to make good leaders among the wisps 
 
 Purple: the frenzy wisp is the after math of Dr. Robotnick's transformation of the wisp to drain their energy to power his generator, they are very vicious and destructive 
 
 Violet: the Void wisp sucks in everything and everything that it encounters in it's path, like the frenzy wisp they are violent and total terror! 
 
 Pink: Spikes let sonic climb up walls and across ceilings with ease, they also can break blocks, they are known to be harsh, but are kind by nature 
 
 Cyan: the Cyan or laser wisp lets Sonic blast off at lightning speed for a short time, if there are Cyan Diamonds near and while firing the shot and you hit them you will bounce off a lot of them in succession, they are somewhat crazy and light headed 
 
 White: Not much to say about these except that they give sonic boost like in Sonic unleashed or in Sonic Generations, they are very friendly and are easy to make friends with.
 
 

I mainly like Void. He sucks everything, literally, everything.

My favorite Wisp would have to be Void. It is very good, but sometimes hard to control.

That's a hard question! 
The pink is cool because his spikes make you walk by walls
The yellow and drill/underwater zones are simply amazing and cool
But Purple... you can eat ANYTHING with purple.
So yeah, I choose purple frenzy

Mine is the void because it is in the final levels. It is hard to control sometimes which makes it really hard but makes up for it by eating everything and being plain awesome!

I like Void the best because it is the most destructive, and I love destroying environment in games.

My favorite is the void, the way it looks is amazing and it is so powerful

For me void is my favorite because it just looks so cool.

Laser because you go really fast and reminds me of pong. Also I like how sonic shouts LASER! every time you do it.