I haven't opened the gifts under the tree yet, as we tend to leave that until Christmas Day. When people I'm not going to see on that day - or, indeed, for a while - exchange gifts with me, though, we generally open them then and there so we can see each other's reactions. From such friends, I have received:
Book 13 of The Wheel of Time
Cadfael (complete series on DVD)
Sandman: Preludes and Nocturnes
A Trócaire global gift [http://www.trocaire.org/globalgift] of pigs
Some yummy Thornton's chocolates
I wasn't expecting any of these in particular and I'm delighted with them. In general, I tend to buy anything I particularly want for myself, leaving gifts as surprises. I find it tends to work quite well!