Sorry Cary/Quassi, you and I just aren't on the same page.
But don't feel bad that's true of some others on this site (see, e.g., Ward, Matt) who aren't so much into QUIRK.
I think Dooks is simply the perfect "2d course of the day" for anyone. I played it about 10 years ago as the second round after a round at Waterville. We'd not heard much about Dooks and it was a blast--short, very easy to walk, pretty scenic, and tons of QUIRK. Yeah there are some blah holes but I've forgotten them due to holes like the unforgettable 13th and the 17th and 18th mentioned above. Plus the people at Dooks were as warm as any anywhere. The perfect ending to a great day of golf in Ireland. I'd return there in a second.
As to Tralee, overall it's clearly got the stronger golf holes and it's a hillier and much longer walk for sure. I enjoyed it--the holes along the coast are quite good, especially on hte back nine. The inland holes are weak. Is it a "must play?" I guess that depends on what else you're playing. I haven't played Old Head, but from what I've heard it resembles Tralee--scenic but the golf is OK not great. I'm not sure I'd return to Tralee unless it fit my schedule.
I think I'd be able to get my now 50+ year legs around both as Dooks really is an easy walk; however, I understand your reticence, especially if you are trying to keep something in the tank for later.
Just one man's QUIRKy opinion.