Hard question (for me)! I'm not an expert and I don't know if there's a rule. But if you want to use past tense in your sentence I´d say: “¿Cuánto tiempo hace que te hiciste hincha de…?”Cheers aldonzalorenzo!... Does it just sound wrong, or is there a grammatical violation?
“Aficionado” is a generic word for the things one likes. E.g. Pepe es muy aficionado a los deportes, a la montaña, a la lectura. It´s also used when you do something in a non professional way, kind of amateur.Muchas gracias! But what about aficionado, why wouldnt you use that?