Well I`m still playing at 46 , several of my friends play too , some of them couples , my families spread all over the country and we all meet up in the game when we can , it's a novel way to keep up with the news and have some fun at the same time , ages go from 10 through to 46 so attitudes vary a lot , my 10 year old just loves PVP and only ever plays Horde , couple of us love RP as we used to roll the dice a lot years ago :D
Age doesn't seem to guarantee behaviour , ever played with 20 odds when they log on drunk ?
Oldest guy I play with was well into his 60's , used to love pvp and laughed his socks off when he stuffed up :)
Just my five pennys worth.