It's all about making love at the end of the day
masochists are also sadists deep down, and vice versa.
I believe its a matter of circumstance.
Find yourself a BF who's smaller and more subby in the bedroom, and you'll find dominating him fun and exciting and so natural
date a slightly bigger guy who isn't so subby all the time, but sometimes maybe strokes your hair and stuff and puts you in a subby mood, and suddenly he's fucking you senseless and you couldn't be happier.
Like the Swedish guy said ^ he's got the body of a bottom and his BF obviously has that of a top. if he was like 6ft 2 with a bigger dick, and his boyfriend was an inexperienced submissive nerd, he'd probably fall into being very dominant for him eventually, and feel like it's his natural role.
Me personally I was a subby bottom too, but tbh dick hurts me when it's more than like 5.5inches, and even then in certain positions it's just too big and causes me pain when it goes too deep. Also I'm like average height so I'm not that small, also I have a visual taste for smaller cuter guys, so if I ever did feel submissive, they can't really accommodate anyway, and I don't ever really feel submissive because they're so smol and weaker than me.
So
Tl;dr:
depends what assets life has given you, and following that, what type of guy is your visual preference at any given point in dating