Which color are you better with?

most people say white, but i often find (atleast notice) myself playing better when i play black

White has more initiative, while black is more passive. In a sense, white can be one step faster than black, and black just keeps up

I have a higher winning percentage with White, but pretty well all of my spectacular "big wins" have been with Black.

i don't think it makes difference to me

White moves first (there's an advantage for white for moving first), so white can develop fast and attack the black, whereas, black mostly would have to play a defensive game. White has a slight advantage because of this. There are many aggressive gambits for black though. 

Read about The first move advantage for white here

maybe

also, i usually find myself playing more aggressive when playing black rather when white

Under the Stats tab you can check to see how you do with each color.  I’m pretty even with a slight edge to white.