Oddly enough, I've never been a big fan. I've heard nearly all of their albums (probably every one, but I can't be 100% sure), yet only own about half of them and only listen to 2 or 3 of them. So I sort of debated for a while, then figured, "Why not? The price is right," and then pulled the trigger.
I think my favorite Pink Floyd album so far is: Wish You Were At The Dark Side Of The Saucer Of The Moon Wall Obscured By More Piper Secrets Full Of Clouds At The Gates Of Dawn. But their music tends to confuse me a little.
I'll give the entire box set one complete dutiful listen from disc one to sixteen. No, check that: two complete listening sessions (one with speakers and one with headphones). Then, I'll put it all aside in the archives unless something seems particularly meritorious of a further investment of time and attention. I can't say that I'm particularly hopeful, but I've been surprised (many times over) before my music that didn't seem to catch me on the first pass.