Steady, you guys, if the OP has small hands like mine, and/or fragile skin, strings matter a lot when you learn. I learned on thick roundwounds, and thought they were OK, until I tried flats on a thinner neck (moving from my student cheapo to a 4-string Warwick). Suddently I was able to play faster, without too much string noise ('cos when you have small hands you have to move them a lot over the fretboard!) and the allergic reaction caused by nickel rounds was less of a problem on flats.
So I'd say, soft flats - Thomastik or D'Addario Chromes. Forget about horrid rounds.