I can get where you're coming from.
I've been called a plastic fan. I was a Nottingham Forest fan until 1999.
I was at Highbury in summer 1998 when Forest opened the season away to Arsenal. Arsenal won 2-1 with a fantastic goal from marc overmars. I was so impressed with Arsenal's play that I decided to sort of be a closet fan of theirs that season.
Forest were relegated that season and still haven't been back in the premier league. Back in 1999, if your team wasn't in the premier league, you couldn't watch them play in the US. Also, the internet wasn't what it is now, so getting even a box score from the football championship was sometimes a challenge. Video highlights were near impossible to find. Since they were so hard to keep up with, I switched allegiances. Took a lot of grief about it, and still do to this day.
So since 99-00 season I've been a bigger Arsenal supporter than I ever imagined. Still follow Forest a bit, but at this point, if they ever get back into the Premier League, I'll be for Arsenal when they play.
I guess that makes me a plastic. Not sure. If so, then so be it, I can't help it.