Berman's edict of not making aliens too 'alien' or people wouldn't relate to them.
Berman's edict of sticking to a specific "dull" music format because the music shouldn't stand out in his opinion.
Berman's trend of neutering every series premise in the pilot, maquis join starfleet as part of the Voyager crew! What's that, tensions between Humans and Vulcans? T'Pol is more or less integrated into the crew in the pilot.
The wimpy choices of lead characters. Shows like The Shield, Dexter, The Wire The Sopranos, are not afraid to have complicated main characters. Archer was kind of the last straw. Yet another boring goody two shoes. *yawn*
There was just such a lack of passion, dramatic risk-taking in recent Trek that it's just kind of sickening. I started getting into shows like Farscape, Buffy, Angel, Firefly, B5, BSG, Lost........... and then I would look at the "antiseptic" style of Voyager and Enterprise, and laugh. Why would I waste my time with that shit?