Flew AA a couple of weeks ago in economy.
Seats are okay (lots of legroom, although recline not brilliant - BA's new World Traveller seats are more comfortable, although they have less legroom), food is okay, we had personal seat back TVs, service was efficient and friendly.
The outbound trip was about half/two thirds full - so plenty of space to spread out. The return trip was completely full: very uncomfortable - especially since I had the middle middle seat (they configure their 777s 2-5-2). So if I wanted to get out I had to climb over two people (one was my husband, the other was a stranger). I waited for the stranger to go to the WC before I went (my one and only time on the 6 hour flight) - so I didn't inconvenience her by making her move. When I came back to get to my seat she glared at me (from under her blankets) and made some sarcastic comment about "just getting comfortable" - nice consideration on her part (I almost offered to swap my middle seat with her isle so I wouldn't "inconvenience" her any more...).
If your route is served by a 777, then avoid the middle middle seat (E, I think) - very claustrophobic :-( (had my husband one side and a solid bloke with sticky out elbows the other side - no arm rest for me!). Luckily I am only a little person...
Otherwise AA are a good airline. Have a great flight to LA.
Boo