'Tis the season to make top 10 lists, and we at GeekDad are not immune to the allure of ranking our favorites. But, rather than us pronouncing the best from upon high, we want you — our illustrious readers — to help us out. This week, Ethan Gilsdorf and I will be taking nominations for the best sci-fi and fantasy TV shows, movies, and quotes. Next week, we'll ask you to vote on your favorites. Then, the last week in December, we'll publish the results here on the pages of GeekDad.

Today, we are asking you to nominate your favorite sci-fi TV shows. I've included a list of my favorites to get things kicked off, but I'm sure I've overlooked a few here or there. Add your favorites in the comments for this post, with a brief one or two sentences as to why you think it should be nominated for consideration.

One question, though, is what's the difference between sci-fi (or science-fiction) and fantasy? As a quick differentiation, I like Rod Serling's definitions, "Science-fiction, the improbable made possible; fantasy, the impossible made probable." For our purposes, we've decided to define them like this:

Sci-fi: Future/space/technology as primary theme.

Fantasy: Supernatural/magic/mythical as primary theme.

That's not to say that sci-fi can't have magic or fantasy have technology, but we ask you to look at the primary themes. If you disagree with someone else's classification during the nomination period, we invite you to comment.

So, to get the list started, here is my personal list of top 10 favorite sci-fi TV shows:

It was difficult to pare the list down, and I know this list is far from complete, so let me know your favorites. Nominate shows you think we should include in our list by adding a comment below. You don't have to nominate 10 shows; nominate as many as you want, but please give a brief description of each as to why you think it should be nominated.

Look for the list of nominations to vote on this time next week.

Tomorrow: Nominate your top fantasy TV shows.