This has been a good season and had a chance to be great but because of missing out on the title, in terms of achievement I'd say 1980-81 was better.
However, as millersrus mentions, despite not winning anything to me 1981-2 was the best. We had a great team, a marquee manager, and independent of them being in a 'low' spell we were up against some teams who had been prominent in the top division through my childhood/t.eenage years. From the opening day 4-1 win over Norwich, doing the 10-1 double over Chelsea, coming up against the likes of Leicester City, QPR, Newcastle, Derby, to the 9 game winning streak in February/March that put us on the verge of 'the dream'. Just two missed penalties away from promotion to the top flight. The only shame was with such a great season we still finished below Sheffield Wednesday and Barnsley but at least they missed out too.