I just read through this thread, and I have to say that besides the hundreds of threads of goofy, wise-ass comments that get fired up here on a daily basis (which I certainly enjoy), it's thoughtful, insightful discussions like this one that make this board such a great place to hang out.
One of my students recently asked me about Sonny and his penchant for quoting other tunes in his solos, and I was reminded of an interview that Sonny did in one of the 'big' jazz magazines a few years ago. The interviewer asked if Sonny's quotes were a conscious, premeditated thing and the jist of Sonny's response was that, when he's improvising a line, he can be in the middle of a phrase and suddenly realize that, "Hey, I just played the first few notes of "XXXX". So, since my ears were leading me in that direction, I might as well finish that thought" (I'm paraphrasing Sonny here). That strikes me as a very different impetus for the playing of quotes than someone like Dexter (another quote of "Here Comes the Bride", anyone?).
And just to derail my own post: just the other day listening to Trane with Miles at the Olympia in 1960, the crowd goes nuts when Trane quotes "Mona Lisa" in one of his solos. It stuck out to me because Trane's not often much of a quote guy.
But, now I gotta go track down some of the Rollins sides mentioned in this thread that I haven't checked out. Good thing it's almost pay day.