I'll pick Falcon as my favorite Joe. A big part of it is because he was the first Joe I got, so I used him a lot back in the day. Also, he has one of the best sculpts of the original line, very detailed and realistic. He's got a really good file card too.

For favorite Cobra Trooper, I might go with the blueshirt, as they seem to best symbolize Cobra. That look is pretty iconic.