Games - At a high level. You don't realise how much training and precision goes into a good games run. I get such a thrill from doing a race really well but it feeling effortless.
My last horse was a bit too big for games and got a bit hot so I had to manage him really carefully - My new horse is only new at games but i'm already having a ball training her and being able to do things at a decent speed again.
Jumping - I can take it or leave it, it's fun, sure - but also much more potential for harm to my horse, and I do love the thrill of doing a race at a flat gallop.