I'm a huge Star Trek fan (but not so much that I speak Klingon...although I have been known to call people a "putak" before). I appreciate how they make an attempt to explain their technology and make it reasonable...like the "Heisenberg compensators" in their transporters as acknowledgement to the uncertainty principle, which would be a hurdle in the process of replicating matter exactly. And their use of warp drives, which warp spacetime around the ships, so that they are not traveling through space, but rather around it instead, thereby not violating the universal speed limit as set forth by Einstein in his Special Theory of Relativity. Without faster than light travel, hopping from one star system to another would be ridiculous.
Little details like that make a show more enjoyable, when you know they are making an effort to make things seem more realistic and not just pull things out of you know where.
They even made an effort to explain why so many races were humanoid in appearance, in TNG when it was revealed that an ancient race of humanoids had seeded a great number of worlds with their own DNA.
I thought the Borg were just about the coolest aliens ever introduced on a sci-fi show too.
When I was a wee lad, watching the original Star Trek series when it originally aired, I remember thinking why is that pudgy blowhard the captain when Spock is smarter and stronger, does mind melds and nerve pinches...LOL! I have to say, I like Capt. Picard from TNG much better than Kirk.