I use a blade for my arms, shoulders, butt, and jewels.
For legs, I just take clippers because its a real pain in the ass to shave that area, I dont like how it feels, and most chicks are pretty indifferent to leg hair (at least for me). I just do it to balance out the rest of my body.
For chest, I nair. For face, Ill use a facial trimmer or a blade, depends on what Im doing.
For back, right now I just use flexibility and a blade when it gets a little annoying. Ive thought about buying one of those back razors for easier reach...