I don't have money to spend too often, so I guess there's enough time between when I do and don't have any that I don't get burnt out collecting. It probably helps that I've barely collected anything so far and there's still so many more games to buy and play that I've never been able to before, so it keeps me excited. There's a folder on my computer with images of lists and text of lists of recommended games and I want to get to all of them and more.
I would never ever sell my collection, especially since I'm one of those people who prefer a little comfy clutter than empty space. I wouldn't mind having lots of wires around and games stacked on the floor as I sit in front of my TV wrapped in blankets, it'd be super cozy. There's also so many games I love, I'd want to replay them the minute after I'd sold it.
Playing games, I'm usually not able to play one single game all day, I jump around. If I get tired of playing, I go on forums, watch videos, read a book, get something to eat, then in few hours I'm back to playing again.