You can LP anything as long as you don't suck. Quantity cannot mask quality, so as long as your material is top-notch, it won't go unnoticed by those who can take the time to watch it. That being said, I've sort of personally gotten myself into a trap with LPs. All the games I play I LP, so I can't play them unless I'm prepared to record. The only games I can play without recording are Minecraft, Skyrim, and Firefall, and that's just because Firefall is a non-linear MMO.