Which trombone do you prefer?

I've played for 40 years and have owned several bones. I'm not a big fan of triggers. The primary purpose for the F attachment is to connect the low register to the pedal tones. That's really only useful in the big-bore tenors and the bass trombones. The idea of bringing sixth and seventh positions up the slide has never been nearly as necessary as I thought it would be. That is, it sounds like something you'd do all the time but you never do it that often, nor do you really need to move from first to seventh in an instant. I got an F attachment (King 3B) my senior year of high school and played it through college. I hardly ever touched the trigger and when I did it wasn't 100% necessary. It was more like making a justification for it.

I suppose there are lots of players who use it and need it, but I'm not one of them. I guess I'm just not good enough to play at the level where you use it. I've never been handed a piece of music that absolutely couldn't be played without it.