Actually, The Wall is when I started not liking Pink Floyd. I definitely prefer their earlier work, even incuding the Syd Barrett stuff, which was dated pretty badly by Syd's trippy songwriting and its general era of production.
After Syd freaked out and Dave Gilmour took over guitar and songwriting duties, the band really seemed to have some coorperative self discipline. They were still very willing to experiment and break new ground, but they were much more careful of their internal musical craftsmanship than Syd was interested in being. This was the period of Meddle, Dark Side Of The Moon, Wish You Were Here, and to a slightly lesser degree, Animals. They were definitely a team during this period - 1971 to 1978 or so - and it really shows. These are far and away their best albums in my opinion.
But starting with The Wall, they really stopped being the Floyd team and became more like Roger Waters and the Three Stooges. The musicianship was still there but Waters' self-pitying and self-indulgent songwriting dominated the band, increasingly drowning out the earlier tightness and focus they had enjoyed.
Since Waters left the band in the mid/late '80s, they've kind of just been the Three Stooges - free of Waters' overbearing ego, but with their own visions atrophied from disuse. They have made plenty of money repeating the glory days formula, but they haven't contributed anything new to their own catalog since about 1980.