i'd just like to chip in and say the worst i ever tasted was bacon flavour! my everyday ones are FA creme de menthe, RY4, peanut butter, green apple (the last 2 from Wizard) - in no particular order. Wizard labs do a great Earl Grey tea - but an entire bottle of it is too much and so i just drip a bit in when i feel like a change of taste. For a decent tobacco-like one i like the smoked Virginia tobacco or one called royal - which is rather strong and earthy - but easy to sweeten to your liking.
i hear that candy floss flavour is great as a flavour addition as is a caramel to a lot of the stronger flavours.
T