Thanks all for your replies. All info is good info.
I don't thinks its too much smoke. I've used all types of woods before.
The flavor I'm getting is like its gone "off", if you know what I mean. Kind of like when you know milk has gone south.
I'm wondering if its some of the collected grease in the bottom. I try to keep it clean, but that doesn't seem to help.
For a control, I do the same beans on my char coal/wood smoker. They're fantastic.
As far as re-seasoning it, would cleaning out the smoker (simple green) and re-oiling and smoking it help?
Thanks all again.