i've got some ergon GC3's on my hybrid, and i have bar ends pretty close to flat, maybe a 3 degree rise or so.
Makes no sense to me, but I feel the same way about bar ends in general. Flats, horns, or drops--pick one.
i've got hydraulic disc brakes on my hybrid, and it can only have flat bars beause no one make hydraulic levers that will fit drop bar diameter. but the one hand position of the flat bar is not enough for me, so using bar ends to get more hand positions is a no-brainer for the solution.
EDIT: just realized that i'm responding to a post made over 3 years ago............. oops.