This year my present was a shiny new graphics card (my thanks to my folks)! Specifically the Gigabyte HD7870 2Gb OC version which is a pretty tasty piece of kit, and a substantial jump up from the Radeon HD4870 which I had previously in terms of overall performance. This was purely for additional power in terms of gaming, and indeed in Starcraft 2 all of my settings immediately jumped to their highest which was nice to see.
Of course it wouldn’t be my latest PC without there being some teething issues!