I don't know about other horses, but TB's can read minds. I vary my training routine a lot since both my horse and I have the attention span of a flea. We ride in different rings, surfaces, parts of fields, etc. One day last week, I had a very stressful night at work, so the next morning I went up there with only one intention of hauling butt around the hay fields. Got my horse, tacked him up, put a leg over, and he marched a bee line toward the entrance to the fields before I could even cue him. He knew exactly where he was going and what we were doing that day. He galloped around happily on and off for a half hour to give "mommy" the stress release she so badly needed.
Yes, those moments are the best.
You just have to see your distance...you don't have to like it.