Tommy I go back and forth on. I never really listen to the whole thing - I think it peters off a little toward the end - but I think there's lots of good stuff on it. Fair to say the melodies aren't the most memorable, but the harmonic sequences are to me - lots of cool ones, like "Amazing Journey", "Cousin Kevin", and "Go to the Mirror". It feels to me like a more genuine attempt to fuse classical and rock ideas than a lot of the prog stuff from around the same time, and I think that's probably why there's not much "rawk". I don't think it's so much the movies that made it and The Wall seem cool as a kid to me, more just the story in general.
I suspect Live At Leeds' reputation partly reflects being one of the early rock live albums that was not just a marketing product - but maybe I'm forgetting about a lot of examples to dispute that. It is a weird tracklist on the original - I only just realized that "Heaven and Hell", a great opener, isn't the first track on there. The version I remember is the 1995 one-CD release, which I think is probably the best version (I don't think any of the Tommy material is particularly good live).
I owned Isle Of Wight once but sold it to a friend and remember very little about it.
I got into Who's Next at an impressionable age and thought it was amazing for a few months, then eventually I thought it was mostly bad and still do. I suppose I could stand to relisten to it. "Baba O'Riley" is still great. Quadrophenia is pretty bad in my recollection, too. I think Daltrey's vocals got a lot edgier for Who's Next/Quad compared to Who Sell Out/Tommy, where he's borderline angelic much of the time, and that's a big part of why I like those albums a lot less.