yes, 31. hard to deal with most of the time, so i usually tell people i'm 45.
i think the curmudgeon starts to set in at your age/josh's age/jake's impending turn, but after a few years, if everything goes well, it becomes less verbal and more of a quiet, formal resistance toward things you aren't inclined to do.
i've seen quite a few self-proclaimed old farts under the age of 25 who are basically just deluded, bellowing assholes.
everyone tells me I'm a curmudgeon and has done so for years, so I don't doubt anymore. And besides, my curmudgeonly fiancee is actually older than you. I should start telling people I'm 45, too.