Let's see, after trying the 5 of them (since I didnt have it yet when sly was in) and the 2 from E3 (Big Daddy and Drake), I had soem mixed feelings. I thought I wouldn't like parappa, but I did, radec was hard for me to use, so was fat princess, I had an easy time with drak and sweet tooth, and big daddy was fun too. After those initial tries, I went with Sweet tooth for a little while since he was the easiest to remember for some reason. After getting used to the game, I've moved to Kratos to start learning his moves. I'll keep going through them in this way until more characters are playable.