Wow, that's not bad at all for 15-20 minutes. It always takes me quite a while to hand draw anything. Perhaps I ought to try this exercise too.
Cheers,
-Arsheesh
Don't shoot me, but I actually like the first one better. I could be biased though; ink-and-watercolor looking maps are my favorites
Edit: Darn. Can't rep you yet, gotta spread some around first.