Only twice! I'm surprised as well, especially once I really started paying attention to stuff like that. All my guitars stay in cases, my acoustics especially, and I try my best to monitor humidity. Honestly, I did one setup on my classical, which probably needed it just from neglect, and I just recently did one on my ES-135. EDIT: By saying "I did a setup," I mean I took it to someone else.Do you really live in Chicago?
Man...only twice...down in Washington D.C. I have to adjust truss rods every year twice when seasons change. Humidity for christsake.
Now that I think about it, I guess I've done three, but that third one included the addition of an Earvana nut, so I guess its only natural that there would be a setup involved.
My Taylor 414ce for some reason has been a trooper. I've played it outside at early morning gigs in late fall, taken it to the beach, etc, and its never needed a setup. I'm sure if someone looked at it with a keen eye or was a very picky player, they might be able to find something they don't like or prefer, but it holds its tune incredibly well aside from rapid temp changes in a room and the intonation has been spot on. It may need a refret, in which case it will also get a setup at that point as well.