Ditto on the TT for my least favorite. I judge a lot of 4-H shows and it makes me cringe the number of horses I see in thumbs and the kids & parents that are wondering why the horse is evading. They are cheap and seem to come on every starter set so it really doesn't surprise me to see so many out there in use.
I have tons of bits but a few go to's. Those I use on a regular basis, Myler loose ring comfort snaffle, hollow mouth eggbutt, french link on my english mare, Billy Allen is my go to with a shank, sometimes a jr. cowhorse and my retired reining mare goes in a spoon with a roller (or a snaffle with kids at the wheel). I also completely agree with smrobs about shanks, have to have that independent feel.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.