I agree with people who say Vaseline is useless - I have no idea why so many people use it.
Anyway I currently have Palmer's Cocoa Butter, Burt's Bees, and Blistex. Out of these three I find Blistex the best. I have the one marked 'MedPlus' so I don't know if that means it is a different type and therefore that might be why it's more effective. I think the Palmer's one (have just applied it, at work!) just sits on the surface and doesn't seem to repair my lips so I'd probably say that's the least effective out of the three I have.
I used to use Nivea (in a blue stick) which I found useless. I also find Body Shop lip balms (in the tubs) equally as useless.
I once had the perfect lipbalm. It was in a long thin stick and my sister had ordered it from a catalogue. I never remembered the brand (I think the name had worn off) and I lost it on holiday once, and only after that did I realise how rubbish loads of lipbalms are.