Eh, 1 was okay if you watched it way back when, it was mostly showing off, but the whole vyger thing was an interesting forwarding of the general trek picture.
2 was great, 3 was bollocks, 4 was by far my fave, 5 was boring, 6 was pink blood and an awesome round or two of shakespeare, I enjoyed generations because it had been a big gap between the movies and I quite enjoyed seeing Kirk and Picard together.
First contact was enjoyable because ITS A TOMMY GUUUUUUUUUUUUUN, and Assimilate this but ruined by "They've adapted (x1000000000)".
Insurrection I didn't really mind too much but certainly wasn't anywhere near the ones I enjoyed.
Nemesis .......Could only really have worked if it was more like the reboot.
The reboot was awesome (aside from completely destroying canon rather than simply suggesting an alternate reality (which is already canon!) ¬.¬).
Voyager was awesome if you knew all the crap they never explained or even reeeeeeeeeeally hinted at in the series.
Ending was rushed, stuff to do with the borg was horrible(turned them into 'just another race' :I).