Me too! Until I leanred that guitars came in different scale lengths! Embarrassing. There was no internet back then. Sinve then, I have found my comfortable string gauges for a particular scale length.
I've been using GHS TNTs (Thick-and-thin) for 26 years. 10-52. I love them, and can't imagine ever changing, unless arthritis begins to become a problem, then I'd go to straight 10's. But I can't even play straight 9s anymore, even on my old Charvel/Jackson shredder. They're like rubber bands.