I'm in exactly the same boat as you StrutterBlue...I'm born and bred in the West Midlands, my dad, mum, uncles, grandparents were all from Manchester and were all blues.... I was even named after two City legends. My first game was in 1978 and I'm a ST holder. I have travelled from the Midlands for years to watch City. I've now decided that I'll turn it on its head and wind the detractors up a bit...Whenever I get "when did you jump on the bandwagon?" or sneered at for being a non manc and a glory hunter I reply with "I've been a City fan for the last ten years or so but before that I followed Chelsea and United in the 90s and 00s and followed Liverpool in the 80s....I like to watch a winning team, dont you?" The reaction I get from them is incredulous. I Once gave this answer to someone in the pub who had the cheek to ask about my credentials shouted to his rag mate (who was from Staffordshire BTW) said "can you believe this...he used to follow united, now he follows City!"....the rag just shook his head to disapprove of someone being a glory hunter.....oh the irony. Only the other week I got short shrift off a Villa supporter for being a glory hunter...I didn't say anything to him because I can't be arsed to justify why I support City, but a mutual friend who I've known for years put him right on the subject and he completely changed attitude after that.
I really shouldn't have to justify why I support the Blues to strangers, I know what my City supporting credentials are and as the late great Bobby Ball would say...that'll do for me cocker!