+1
I realise that it's early days and that multiple design options have to be tried out, but to an end user (regular Joe coin holder) "number of rounds" is meaningless. How am I supposed to know what the difference between, say, 4 rounds and 16 is ?
There should be 2 settings:
[1] - Privacy (I don't want my transactions visible in the public domain)
[2] - Obscurity (I don't want the NSA ever to find me and my life depends on it)
Further, IMO, setting [1] should be the default for ALL WALLETS. i.e. level playing field. If you're in Darkcoin, then everything's private, the whole damn lot, otherwise why would you be here.
The reason I suggest that is, imagine if your bank offered you a "transparent" option on your account where your transactions were visible in the public domain. You'd tell them to take a run and jump. It's unheard of in regular banking for financial activities to be anything other than private ALL THE TIME.
If someone buys into Darkcoin, then it should be assumed that they want financial privacy and not leave banana skins lying around for them. It's just a statistical fact that some people will not realise they had to "mix their coins" before sending them, then you've suddenly got angry holders complaining what a crap system this is.
P.S. IMO you also shouldn't be allowed to send coins unless they are mixed at least to the "privacy" level. (I suppose exceptions could be made for testing etc, but it should be something like....you need to go to command like mode/debugger and enable it, then it gets disabled immediately on quitting the wallet).