I really like Tumlbr (mostly for the crack-tacular fan art), but I agree that its comment system is awkward. My other issue with it is that there's no filter system that I've figured out yet. As one person noted, "Tumblr can go from kittens to orgies in two posts". I think you can block certain tags, but that only works if the poster bothered to tag it in the first place.

It seems most of my fb time is spent gaming. Stupid games...