I have Tennessee Walkers - love them, but (IMO) the popular train breeds all have their strengths and weaknesses.
All of the TWHs I've known have sound minds and huge hearts. There does tend to be different "types" of TWH's - some are a smaller or leaner build, others are taller and more "stocky." It's really just a matter of personal preference.
If you do have a gaited horse and ride with a group of non-gaited horses, there is always a chance you may run into problems matching speed with the others.
Gaited horses are meant to cover ground with a swift, smooth-riding movement. While it's not always the case
, the other horses may have to jog, trot, or even lope or canter to keep pace with a gaited horse. The alternative would be constantly having to hold your gaited horse back to what's often called a "dog walk."
There are very strong opinions in both camps when it comes to gaited and non-gaited trail riders. Non-gaited riders often accuse gaited riders of being speed-freaks who just burn up the trails, and say we go too fast to enjoy the scenery. On the flip side, many gaited riders say that non-gaited riders just don't get to see as much in one ride because it takes them so long to get anywhere.