When I grew up, I frowned upon Science Fiction. I just thought it was all about stupid spaceships and who wanted to read about that anyway. So I overdosed on elves and dwarves until they made me sick to my stomach.
Now my fantasy tastes tend towards the steampunk/new weird and I developed a taste for science fiction in the form of cyberpunk - but also realised that space operas are great reads.
I don't know if I'll ever rush to go back to the elves and dwarves though.
I guess what I'm trying to say is that my appreciation for science fiction books (as opposed to movies which I always loved) actually grew as I got older. So it better not be on the wane.