I've become more "mercenary" these days about what systems I use. They're all just tool boxes to me now. I do have my favorites that's mostly because I have invested into them and I've got a better skill set. Pathfinder second edition and the upcoming Starfinder second edition for example.
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At the end of the day whatever makes for cool, silly games. It's why I like stuff with creative options for players.
I must say though it is very charming to meet you Spotty. Finding another GURPS head who gets the nonsense I do helps.
For context: my 'active' shelf. Not shown, the bajillion PDFs.