Maybe after a period of a year or more, but definitely not 6 months. A lot of people go through times when they have to take months off of the game for one reason or another. I doubt I'd be playing a game where if my rl life got busy and I took a break, I ended up having to change my name because someone had been allowed to snatch it up from me while I was gone. If you want to be able to use the name you came up with without dealing with it being taken, then be more original.