Matador has a great post up about how you know you’re too old to stay at hostels. Just about every one of those applies to me, except I don’t think about telling people to shut the hell up after 1:30am, I actually say that to them.
Most cities have non-party hostels, so those are the ones I usually stay at, thus bypassing many of the problems mentioned in the Matador post (party boats, etc.). And in Southeast Asia, a private hotel room with attached bathroom was so cheap, I usually went with those.
But some of the things they mention–rolling your eyes any time someone talks about “just living,” stereotyping Australians–well, those apply anywhere.