My Dyson vacuum - I got it from SO this past Christmas. It is AMAZING! I'm impressed he even got it for me. I think he thought he would be in the dog house for being me a vacuum (or his friends had him convinced he might be).
When FI and I started dating he bought me a dress for my birthday. It was a really beautiful dress too. The thought of him going to all these stores and finding the perfect dress for me just melted my heart.