At this point in my life, the only Hugo categories I ever expect to be eligible for are "Fan Writer" and "Fan Artists," and I'm positive that there are many more deserving people in each of those categories, all of whom are better know in those ways than I am.
2: Be a Guest of Honor
Similarly, I don't see a Worldcon honoring someone whose main contribution to fandom is helping run regional cons, or even helping with Worldcon.
3: Be chair
OK, this is orders of magnitude more likely than the first two. But at this point, I cannot see any combination of bid location and local committee that I'd want to head up to end up running a Worldcon.
But when all is said and done, I should and likely will be perfectly happy helping out on many, but not all, Worldcons at least once I am sure I've found my niche -- and I'm seriously thinking that I may have found it, or at least one likely one.