Welcome to sffworld Raule. I'm in a similar situation to you--I have two kids, read a lot when I was a kid myself, but stalled for a while in highschool and university (when I didn't have time for pleasure reading). I've really just got back into reading in a big way the past 5 years or so.
Reading is a wonderful way to keep your brain from turning to mush when the daily grind is unstimulating. (I too worked as a secretary for a couple of years, it was the most boring job I could imagine and I kept from going crazy by tucking a book next to my computer and reading when the boss wasn't watching!).
I'm sure you'll find sffworld to be a valuable resource in figuring out what to read next. It's also fun to discuss the books you've already read with others. Congratulations on the new bookshelf, by the way! I'm in the process right now of convincing my husband I need a new shelf too!