I'm not really bothered either way by it. I've only had it with tobacco, though. Some people say they get high, but it's only because they sucked so much smoke into their lungs that it's cutting off the oxygen to their brain.
Where'd you go? Edgware Road? I remember there used to be a place in the Trocadero too, which made the place smell really nice, but I'm guessing that's closed since the smoking ban.