I kinda like both of them, but right now, #33 would win. Especially the fact that I could use the square by itself as an avatar... could you try and make the font a bit 'rockier'? As in put a bit of a texture on it?
Same goes for #32... and with that one, maybe the climber should actually hang of the rock, not the letters
#55 is pretty good - I'm already a big fan! The only thing I can think of is if the climber is a bit more dynamic. In #35 he was reaching into his chalk bag, maybe we can try that here...
#56 is cool, but to be honest, I kinda like the scheme of the other one more :)
This one looks very good already... well done. The only thing I can think of is to put the top leg a tiny bit higher, but other than that, I'm pretty happy with it :)
#80 is very good... I'm just feeling that the top leg of the climber looks a bit odd - not sure how to put it exactly. Maybe because the leg is kinda 'inside' the rock?!?