I toss one in here - the bulk ecdysterone powder that once was sold at NP (unsure if its due for a comeback). That stuff smelled actually pleasant, almost resembling iced tea. However, that stuff had a incredible aftertaste, one that lasted long after the ALCAR/PLCAR/whateverCAR bitterness faded.
I bet we'll get a lot of responses. It is beyond me why people willingly open those things. Curious George? You're nuts.