Al, just so you know that you're not alone...I also prefer Joe as a sideman to his leader dates. I've never really been able to put my finger on WHY that is, I mean I positively LOVE the guy on other people's dates, but his own albums rarely "do it" for me. Our Thing is a major exception to that.
Some of my favorite Henderson solos are on Duke Pearson's Wahoo...especially Amanda & Bedouin.