I started out playing casually, became more serious about the game some time in the R/S era(I know it was before FR/LG came out), and now I'm starting to become more casual again. After five years of breeding and EV training, I'm tired of it. Seeing as how I don't battle on Wifi, and have plenty of things to take on ingame challenges like the Battle Tower, I just don't see a point anymore. All it ever did was make Pokemon stressful for me, and if a game is stressful, you know there's something wrong.
If I ever play competitive Pokemon again, it will be on simulators only. It's too bad Shoddy sucks(DP's metagame isn't exactly helping anything either), and Netbattle probably isn't very popular anymore.