So how would one say "AEOL"? Or AUOL?
Personally I'm not a big fan of AFOL, but I think fan is appropriate. IMHO "Fan" is more used for "fun" things. Looking at your example, neither are particularly fun. I, for example, consider myself an Android fan... almost even a fanboy. (Almost as I'm probably going to get a Windows phone next, but that's off topic. ) It makes sense; smartphones are fun! Music is fun... and LEGO is fun too... isn't it?
When I was in the navy I was surprised how we often referred to ourselves as "pussers" and I resisted using it... but in time I accepted it. It's just a name afterall. I'm all for fighting convention when appropriate, but sometimes it's wiser to just call a spade a spade. Otherwise communication becomes rather hard.
But I wish you luck in your holy cause.