This year I have 36 segments on UA, 35 on AS, 19 on AA, 14 on WN, and 6 on DL. While I've had some good service experiences on UA (including the really excellent FA on my aisle SFO-HNL last weekend), overall UA's inflight service continues to be noticably worse than the others, with FAs who don't seem to like their jobs, don't like interacting with passengers, and do the bare minimum. Of course, this has been a common complaint with UA (and on this forum) for many years. It's a matter of the service culture and open disgruntlement with UA management dating back literally decades. It seems to get passed on to each new generation of FAs.