Love them! And just got one :)
They love to work and have a job. They are athletic and have a good work ethic. My 4 year old OTTB is pretty much BOMBPROOF (tractors, chickens, dogs, cars etc... everything including any noise) Easy to retrain into any discipline. Mine is on his way to being a jumper.
OTTBs are wonderful and giving such an athlete a second chance is really amazing.