I've been all 4 statuses (not GS) on UA over the years. In all fairness, I was only Silver for about a month before I hit Gold (or rather Premier Exec).
I wouldn't say Silvers are the highest maintenance, and I wouldn't presume to generalize at all, there are self-important, selfish people everywhere.
That said, my unscientific observation is that I see more complaints regarding more trivial things from 1K's. I've never seen a Silver write paragraphs complaining how a FA took meal orders in the wrong order, or how they don't know if they could possibly go on with life if they were in BG2.
My definition of high maintenance is whining and complaining about the smallest things, which often times really don't even matter...OH NO, BG1 line is so long...I still get to put my bag right above my seat but I had to rush that glass of wine before push back in 2A.
