Well, to be honest, my baseline game is mostly for show. I think that it impresses the crowd whenever I make really good saves.(I know, I'm psychotic) Playing at the net doesn't really require that as much energy as chasing down the ball. And to tell u the truth, I like it better when I'm using a lot of energy b/c it gets me "in the zone"; I'm weird like that. I'm not saying that I don't ever come up to the net, it's just that I'm a lot more comfortable at the baseline.
(when I'm playin Topspin on PS2, I go up to the net though b/c it makes the matches go by faster)