I play heel down only during really quiet passages that require a lot of control. Otherwise, I’m a heel-up guy, although I recently refined my pedal stroke so that even when I play heel-up, I control the beater so that it “floats” to the head rather than explodes into it. I now get a more open bass drum tone and almost never get errant double hits. Much better!
I am mostly a heels up player since I play mostly rock and metal, but I will use heel down on my hi-hat for control when playing open and closed hats. I find it easier to control the pressure on the hi-hat with my heel down to get just the right spacing for the sound I want. Especially for really sloshing sounding hats.
I play heel down for the eight years I have been drumming except when attempting a loud dynamic. Maybe it is the result of my age, but I experience shin pain when keeping my foot elevated. I don’t think I am missing much with this technique as it is easy to control the rebound with speed and play triplets, ghost bass notes etc. without much stress.
First off, welcome to the forum! I wanted to let you know that it is perfectly legit to play heel-down most of the time, and your use of heel-up technique for loud passages is entirely valid. For the most part, it’s really about your comfort level — if it feels right, go with it. But I think you’ll find that loud drummers generally play heel-up and drummers who play softly usually play heel-down (although you will find variations within each of those categories).
I’m in a similar boat mate. I don’t necessarily feel pain in the shin when I play heel up but I primarily play heel down. I do play a lot of RnB/Jazz etc so it’s extremely useful for playing soft but I still find I can dig in if I have to. Doubles aren’t a problem either. So, yeah I do both! Works for me!