I have one dreaded excercise when it comes to dressage (or riding in general): turns on the forehand.
That moment when you ask for a turn on the forehand and your horse finds attempting to piaffe backwards easier. I can't even blame her, it sounds easier to me too.
Yes, I understand the purpose and how to ride them and how a correctly done turn on the forehand should feel. That doesn't make them any easier or enjoyable to me. I try and do them a lot with in-hand work and Indy understands them from the ground. In the saddle it's a completely different story and absolutely the best way to piss her off. They're getting better and help with the rest of our ride IF we can get them right. I still don't get any enjoyment out of doing them.
So what are the excercises you would prefer to avoid in your lessons and daily riding? I'd love to hear about them.