I think you may be disappointed with the kit lens, because it's not very fast (in the sense of letting in a lot of light). I opted for the DA 40mm f/2.8 Limited as my first (and up until a few days ago only) lens, which I use primarily for taking pictures of my kids.
On a 1.5x crop-factor camera like the Pentax dSLRs, it's considered a "long normal" lens, which means it's pretty versatile but a little bit tight -- which sounds okay given what you said about liking closeups. It's a little strange at first to give up having zoom, but since it's such a nice lens you get used to it pretty quickly.
Check out this post on pentaxforums
http://www.pentaxforums.com/forums/p...al-length.html
with a few of my first example pictures. Or look at my website for a lot, lot more. (look for images with k100d in the filename).