Size Matters here too.
If I had room for like 20 machines, I think TH would have to have a place. It's unique, it's gorgeous to look at. The sound is great. Theme integration is great. Gameplay, however, is like the 5th best thing about it . So, if I "collected" pins - it'd be a little different. But in my limited collection, I need to focus on games I love to PLAY.
TH falls short in that area (for me). GB looks to have the better balance of looks (finally, Stern) and FUN.