When I first moved to France went to see Saint-Etienne a few times, and then Olympique Lyonnais (who I've come to regard as my second team, if I have one). Didn't ever think about wearing kit or scarves at either place, though. When I lived in Tokyo went to see the world club championship between Liverpool and I forget who. Joke tournament really, never been able to take it seriously, but I was suffering so much from not seeing live football that I think I would have gone to see anything.
Went to London grounds as a neutral when I first started following football, way back. Just loved it for the spectacle, especially when they would turn the floodlights on on winter afternoons. Was totally in love with football, nuts about it in fact. Loved my cricket, too, in those years. Then we moved to Manchester, and the rest, as they say, is history.
Not quite as magical as it once was, but there's just no substitute for going to a stadium.