The attacking intent behind football in Keegan's season was phenomenal. We scored 108 league goals that season, which I believe is still the most by an English side in a league season since Graham Taylor's Lincoln in 1975/6 (though, to be fair, we had a higher goals per game ratio in the recent title wins under both Mancini and Pellegrin). But in the Keegan season, we could have scored 150 league goals. Quite often, our finishing was wayward. And there were several games where we were utterly in control at half time and played out an uneventful second half rather than going for the throat (we had some ridiculous scheduling with 46 games to play and frequent postponements owing to internationals). But it was really a wonderful season.
However, for personal reasons, I'll nominate 1988/9. Partly, this was because I was at university in the south so, as well as making it to most home games, I started going away regularly as well for the first time, which I really enjoyed. We took good numbers (in relative terms during an era of low gates), and were vocal, but it was the height of the inflatables craze so it was always a laugh. And there was something about that team, too. Six members of the 1986 youth team were regulars that year: Hinchcliffe, Redmond, Lake, White and Moulden all made more than 40 appearances in all competitions, while Ian Brightwell reached 30. They were all a similar age to me and I loved watching them. I identified with them in a way that's much more difficult today. They'd grown up with the club and it was totally evident both how much Manchester City and how much playing with one another meant to them, which was lovely to see. And their youth seemed to offer us hope for the future. From 1982 onwards, things at City had been pretty gloomy, but heading for promotion with a talented young core of the side couldn't help but make you feel optimistic.