My dislike is to do with blocking my headlight (which is not currently on the bike, 'tis the season woohoo!) and also getting tangled w/ barrel adjusters on my brake cables.
These could be dealt with by one of those bar extender things, but I am finding that I don't like the one I have and can't think of any better way to do it.
Actually I can, the headlight issue can be dealt with by using a fork crown mount (esp. if I switch to dyno hub), and the barrel adjusters can be moved next time I change the housing.