I think it is hilarious that you think it would be hard to come up with a universally (safe) juice, but you suggested Casablanca. I love it!
I never thought I would get a response to this thread. It was my hopes to try and have a discussion about what constitutes safe (like you did), or id there's a such thing - and to start a list. Of course many will hate whats on the list, but people are always asking for suggestions (and often times don't really know what they want), so I figured, why not? I wouldn't consider anything menthol, sharp, super sweet, musky, earthy, spicy, or floral to be safe. What do you all think? I actually think Dekang is a bit safe...did I just type that? Dekang?! Yep! I think it is safe. I wouldn't necessarily recommend it, though.
I completely agree with your definitions of what is "safe"....thats where my suggestion for BWB "Malty" came from...its got some sweetness, but its mild enough, tons of vapor which I know we all love...and doesn't resemble any specific "flavor" that I can think of anyway.
Same with Enigma from QuickNic...that one is more complex than Malty...but still doesnt scream "sweet" or "spicy", etc...I'm still trying to figure out what it whispers to be honest, because I have NO idea what it tastes like, I jsut know its very satisfying!
Now I just need to try Gandalf...and Mr Mann needs to try Engima! LOL