I can think of a few 'unliked' characters from the recent novels, such as T'Lana and Leybenzon. Many of the characters in Vanguard were pricks (or at least they were in Harbinger
, since I never read further than that), as was most of the crew of the ENT-C in Well of Souls
. Si Cwan was often unlikeable, always carrying himself with a sense of entitlement and a rather more barbaric view of justice than most of us here would countenance. By that token, a number of the characters introduced in the Gorkon series are not people you'd want to cuddle up to.
Fictitiously yours, Trent Roman