If I received a serious ultimatum along the lines of, "Either lose the collection or lose me", I'd choose to keep the collection. Not because I couldn't part with the collection (okay, I couldn't), but because if someone was that determined to change me to fit what she wants from a partner... the relationship is not right anyway.

Asking me to stop/curb spending would be different, for the practical reasons many have touched on. Mind you, I don't spend a lot of TFs now, and the hobby doesn't take up much of my time, since I don't use eBay and tend to just buy stuff by pre-order at places like HLJ.

I didn't actually tell my GF I collect TFs - someone else told her before I even got the chance to mention it. She was actually quite keen to see the collection for herself, and likes the fact that I'm so passionate about stuff (: