Personally, this has been my experience:
Best tasting burps
1) HOT-ROX Extreme (berry-licious!!)
3) Ribose C
Biotest's protein and bars have always tasted great, but I never really burped a lot after taking them.
1) original, Spike capsules. That sulfur taste was pretty bad.
2) the old, liquid MAG-10 and 4-AD-EC. That stuff hurt my teeth for some reason.
True story: This was back when TRIBEX was in the non-nano-dispersed capsules (filled with powdered components). Five minutes after taking the full TRIBEX, RED KAT, and M stack I would burp and faint plumes of powder would come out of my nose. Has this happened to anyone??