My first exposure to Star Trek was in grade school. I remember watching TOS reruns with my parents, not realizing that the series had been canceled long ago.
TOS, DS9, Voyager, and Enterprise were ok, but there's a special place in my heart for TNG. During the last half of TNG's run, I didn't really have much to look forward to but new TNG episodes.
My favorite TNG characters are Picard, Data, and Ro.
My least-favorite are Wesley, Troi, Dr. Crusher, and Pulaski.
I'm not sure what my favorite episodes are, but BOBW ranks up there. I remember accidentally stumbling upon part 2 for the first time sometime in 1990, after midnight, on a 5" black-and-white TV when I should've been in bed, and it rekindled my interest in Star Trek.
However, I hated just about every episode that involved holodeck malfunctions, telepathy (especially those three or four mental-rape episodes), or the "particle of the week". Real drama cannot be created with technobabble and contrived situations.