I've never met any of the presidents personally (nor am I old enough to have met many), so I cant really tell, and judging from history, well...
<< there's a big difference with a president who actually did stuff and a president who had 'great things' happen while he's in the office. >>
... quite true. I think many presidents are defined by what's happening at the time (which is usually set in motion by previous presidents/events). Oh, yeah, and getting killed helps too. "If someone hated him so much as to assassinate him, he must have done something great." Heh.