I do agree with you about Star Trek, although it is not my favorite show.
For it's original, yet poorly rated, three year run,..it's left a permanent mark on pop culture. The phenomenon continues still, and I do watch "Enterprise".
There are many science fiction shows that I really like.
The first six seasons of X-files were great.
The Twilight Zone, in it's various incarnations is a favorite.
I also liked Millenium and The Prisoner.
And ther will always be a special place in my heart for Irwin Allen schlock like:
Lost in Space, Land of the Giants, Voyage to the Bottom of the Sea and Time Tunnel.