RIP Mike. Like everyone has said a 'true blue', not many players live and breathe the same passion Doyle had for City.
My fondest memory of Mike Doyle was when he scored at Maine Rd in a rare win against Liverpool in the 70s, but I couldn't find it on YouTube, so i might be wrong - but I can see it in my mind, so here's one of him scoring against his sworn enemy.
[youtube]http://www.youtube.com/watch?v=Cv8R32mDg4Q[/youtube]