Have to disagree. I really liked TNG, for the most part. It wasn't perfect, but it was still good to watch.
One of the really different ones, Brent Spiner. Love Data. Don't really like him that well as a person. He seems rather arrogant and snobby. Saw a Star Trek documentary awhile back that really put his personality into perspective. It really made me not like him that much. Respect him on his gun views, but not on his SOPA views. Pass. The latter just went too far.
Data on the other hand, win. Love how he tried to be human through the series. Respected him for that, it's not easy.