Yeah, I'm not a fan of Chris Collinsworth at all, so I mute him and sometimes do my own commentary.
Normally, it depends on how intoxicated I am. I'm more of a color commentator though, not much for play by play. Its all in good fun.
Back in the ps1-2 days, I'd just listen to Madden. He was pretty crazy on the late 90s versions, sometimes would go off on 6 minute rants about Steve Young's bus.
Funny stuff.