He might have "put his money where his mouth was", but I'm afraid it was under his tenure that we sank to our lowest point, and he left shortly before our relegation to the third tier. He also sold his remaing shares to Thaksin, and we were close to being in another hole there as well.
He was a great football player, but his time running City wasn't great, appointing first Ball, Coppell, then Clark as managers, who between them oversaw some of the worst teams we've ever had. He did apoint Joe Royle, who eventually got some control, and started our revival.
I've no nostalgia for his time as chairman (other than it saw Swales off), just as a player.