i played wow beta through to BC. quit then...didn't have the time anymore, as i got further into my career.
played SC2 through the campaign, felt obliged to after all the hundreds, thousands of hours i spent playing SC with friends back in the day during high school.
playing League of Legends (also Zenche there) semi-regularly. I worked from 8a till just about 15 mins ago for example, so i only have so much time for games these days.
But when D3 comes out, I'm sure I'm going to be up late nights playing :P