Maxi = Butters
I was going to say a cat walking softly across a piano, but what you suggest totally fits!
Stratos = Lloyd from Tales of Symphonia. His author icon is what makes me think this as it reminds me of Tales of Symphonia for some reason...
I've yet to play any of the Tales games, but now I have to just to know what I sound like.
Most people's avatar influence how I hear them. Kairon always sounds like an emotional/excitable person and I always envision anything he writes to be brimming with passion. It sounds like Brock from the Pokemon cartoon when fawns over women.
Pap64 tends to sound like Bowser from the old Mario Brothers cartoon.
Shy Guy sounds like Batman since he changed his avatar. The cartoon one.
Mop_it_up sounds like what I always imagined Birdo's voice to be like since I was younger: a Yoshi from the old Super Mario World cartoon except female.
Golden_Phoenix has the voice of Zelda from the old Legend of Zelda cartoon but at times sounds like Samus on Brawl.