I haven't actually participated in any myself yet to be honest....
but there are different ones..like sig and avatar making at least...well, at least sig that I know of. I wouldn't be surprised if you found some that you could use your skills in !
There is also a photoshop contest thats going right now afaik...oh wait,, thats about sigs again ^^ And if it doesn't exists there is always the possibility of creating one.
yeah I'm genki alright...I purposely split it in 3 parts though as well, so it can have more than just a single faceted meaning. Like Gen-Ki-Dan. You can choose yourself how you read it.