I recently found a book series (Fallen Empire) that is Sci-Fi / space series.
And and the end of the first book, the author listed a Q&A that she had with fans of her fantasy series.
One of the questions was about the tech. The author explained that there was a lot of Hard Sci-Fi out there, but it became very dry because it was focusing on the Science more than the Fiction.
She then sighted, as did G, Star Wars and Star Trek (especially the new movies) as examples of where the story is more important.

Overall, when it comes to Tech, outline what you envision and make sure it seem natural to the world your crafting.

An excellent visual example is the Battlestar Galactica (Moore's), they obviously have an FTL system, but other than mentioning fuel and the limits of calculating the "jump" never focused on how it worked. It just did.

Hope this helps!

"When you have eliminated the impossible, whatever remains,
however improbable, must be the truth." - Sherlock Holmes