Dandelion and Burdock has to be a pretty weird one, although I think of it as normal (don't like it mind you!)
Canned non alcoholic shandy is also pretty uniquely disgusting.
In terms of bitters, I love things like Campari, and Angostura, but can happily leave Brio - it just tastes slightly 'off' to me.
Orangina and the San Pelligrino orange counterpart are yummy holiday in a glass drinks!
The one I miss most is Elderflower cordial - you can get the sparkling versions in stores here, but not the mix with water ones - I found them at a trade fair once, but not since. Love that stuff
http://www.bottlegreendrinks.com/pro...reen-cordials/ I really want to try the strawberry and elderflower, and the apple and plum ones too!