I know that there are are MORE movie fans wandering around this site than this. All you have to do is look through the forum threads to see that there is no lack of opinions about ANY movie, whether sci-fi, fantasy, documentary, etc. (e.g. Frogboys current Hobbit Movie Thread')
I honestly can't recall any favorite or specific quotes that Siskel or Ebert ever made about any movie because I just enjoyed listening to everything they had to say. When I was a teen, I could only find 'Sneak Previews' on PBS for a long time and even then, they would move it's time around, so I had to really search for it. I always did and always found it.
My friends didn't like to talk movies, so I would watch Siskel and Ebert. What movies I saw weren't dictated by their reviews either. I stood in line for Pink Flamingos and some other truly awful movies.
I'm going to miss Ebert's reviews and wit like I still miss Gene Siskels. I like the idea that they are together now, catching up on all the flicks they missed watching together, arguing over some of the finer points, and enjoying each others company like I enjoyed watching them every week.