First angled tip I tried was a Cox trumpet. Took a little getting used to, but I like it. One thing I like is by changing the angle of the call as it rests on my lips with the angled tip, I can make subtle changes in tone and pitch. It just gives a little more depth and range to the trumpet for me. Sure, changing the angle of a straight tip does the same, but with the angled tip, it seems to be a little smoother in control.
Another thing I like about the angled tip is that I can get to my "sweet spot" position faster. I know by feel immediately.