Hmm, I see where you're coming from, but I can't agree with you at all.
To me, it's not an equation. It's not as simple as finding the album with the most songs I like and saying "that's the best". Sometimes it is. But usually, I absorb the album as a whole.
I agree with your point about enjoying songs individually. I listen to my playlists on random just as often as I listen to albums all the way through. But, that's to enjoy the song, not to enjoy the album. And there's a difference. Take Images & Words for instance, I would say I adore Metropolis, Wait for Sleep, Surrounded, and Take the Time. I like Under a Glass Moon and Learning to Live. I'm ok with Another Day. And I dislike Pull Me Under. Looking at those stats, I only have half of the album in the "god-tier", if you will. Now, if we're using that ratings system, that is not that amazing. Scenes from a Memory and Six Degrees probably have more songs in the "god-tier" than Images & Words does for me. Yet, I&W is still my favourite album by DT. It flows really well. I find the feel and emotion behind that album is something that they have never and will never accomplish again, and the album just gives off a very pleasant vibe. But, I've listened to all of the songs individually and as part of the album, so I'm able to distinguish what is strong and weak in each song, and then distinguish what songs are strong and weak as part of the whole album.
Mild rambling. I don't even know if I got my point across, but I think you get the idea.
This makes me lament LPs. The choosing of song locations, and how the two sides would interact made for a much more interesting listening experience.