This is what I'm afraid of! H just qualified for a new "status" in his airline's frequent flyer program (he travels often for work), so we just got a first class upgrade for our return flight on his 49th birthday trip at the end of this month. We're on the waitlist to get the same upgrade on the way there...and I'm very glad it's that leg that's not guaranteed because I'm worried I'd be disappointed on the way back without the same upgrade, lol. I've only ever experienced a first class upgrade once before and it was a very short flight, so I didn't really get the full experience. But my in-laws are retired teachers, and they got the bump once and have never gone back, even on their fixed income. They don't travel often (maybe once a year), but they say that when they do they like to enjoy it.
We've done BWI, BC, WL, and GF RPC before, and have upcoming CL trips booked for CR and GF SL. I would really love to try both the Poly and AKL on theme park "lite" trips, as others have suggested.