Chelsea since their FA Cup win in 1970. Thank God we are now seeing some Premiership success as it had been a long time between drinks for the boys in blue (and I don't give two hoots about how that was achieved).
I've a soft spot for West Brom as a second team. I saw them play Liverpool at the Hawthorns more than 20 years ago when Cyril Regis was in full flight. If Abramovich ever decides that he has lost interest in Chelsea and the sides goes go belly up, I'll go for West Brom. Crap team now, cool name (and they still have blue in their strip).