My Girlfriend loves to make fun of me for my transformers collecting.
She feels that Transformers are "toys" and re-inforces the fact that they are "toys" because I buy them in the toy section.
Yet she doesn't mind the other things I collect (Horror Movie figures, Vintage Stuff, etc) because they are "collectibles" or figures geared towards adults. The Transformers bug her the most though.
Then I pointed out my Masterpiece figures and my imports and how much some of them were worth. She understands a bit more now.
She still loves me, that's all that matters!
Cheers!
-Ian