Is it normal, as a guy, to wonder what my kids will look like?

I'm just 18 and a senior in high school. I'm single right now, but I've always wondered what my children would look like, whether it's with a past girlfriend or with a possible future girlfriend/wife. I'm not saying I want to have a kid right away though - I only plan on having one when I'm married, and that's years away.
I feel like part of the reason I wonder this is the fact that I'm half asian, half caucasian. Depending on who I marry, my kids could either be a quarter asian or a quarter white. They could even be both if I end up marrying someone who is neither white nor asian. Or they could end up being half of each if my wife is also half asian, half white. So many possibilities!