I guess I only "hear" two or three toms, with one floor tom. 13/16 or 10/12/14 are my favorites at the moment. I tried setting up the 14 and 16 side by side, as some of my favorite players do, but it somehow doesn't improve things for me - I couldn't decide which one to hit! If the 14" is the floor tom, I play it like that, if I have a 16", great, but then I hear a 13" to go with it.
I even added an 18" floor tom to one set, got it used for a good price, but only ever used it as a bass drum!
Ha, after a while of dabbling with the 13-16 I added the 12, and now even the 14. Started out as a teaching kit for video lesson, just because most kids have two rack toms, but I found I liked the various pitches. 12-13-14-16-22 it is for now. (Curious if anyone can spot one drum that is from a different company )