I simply like seeing everything, easy as that. for the same reason I don't like doing melee dps (ok that's not entirely true. I like to .solo. on thief/ninja-like classes)

it's really why I love healing the most. I .do. like the 'stress' of added responsibility and I guess I can 'step up' to leading if need be, but I still have the entire battle infront of me and can see these things easily. same with ranged dps. it's really the two things that are the most fun for me. give me a ranged tank (like something that SWTOR 'sort of' tried with the vanguard/powertech) and I'll tank for you :P