Hmmmm. I'm not sure.
Horse-wise: I bought a haycube which was an absolute life saver for soaking hay as it meant I didn't need to break my back pulling heavy haynets out of a bin. It wasn't cheap though!
Oh and my Le Chameau wellies, again, a bit more money than I'd usually spend but no leaks (and I would have had leaks by now with a cheap pair of wellies - I am the wellie destroyer) and enough space for nice cozy, warm socks!
Other than that I'm not sure, I don't really buy very much for myself that isn't necessary/horsey...
My mum got me a pretty good Christmas present. It is a lavender neck pillow that you heat up in the microwave. It is brilliant after a hard day and helps send me off to sleep!