Two major factors i used in choosing pc bsd.....one , the dbsd development is still mired in 5.5 FBSD and had to delay a 6 based released till xorg setles down. More importantly, check the forums, there is a bit too much megalomaniacal flaming going on for the DBSD board.
I have found PC BSD boards, knowledge base, and irc to be very supportive and friendly. They have some corporate sponsorship, allowing the main devs to spend their time working on the system. Nor is iX looking to take over PC BSD , they have their own business and PC BSD is just another PR, dev project proving mutually beneficial to company and distro. The BSD license virtually ensures even a corporate sponsor can't suddenly turn a free OSS project into Xandros. Also most devs stick to the tried and ture ports by preference....pbis are as helpful as say.......downloading slackware pkg binaries instead of the preferred way of compiling. Not everyone has time to ocmpile kde or OOo......Its about choice......im leaning bsd without having to rely on the 'heretical' pbis that DBSD harps on. And its already on 6.1 FBSD wih a six two base in their next release in the coming months.
DBSD tends to harp on the fact that pbis are not bsd.....but you can pretty much run pc bsd as pure bsd, without resorting to pbi pkgs. Except perhaps in update patches......i think ive used five or six pbi for the huge apps.....if they are problematic i use bsd pkg_add or ports. So far PCBSD is way ahead on all fronts and the pbi complaints are mostly fud. Dont like em? dont use em. Its FBSD under the hood, just like DBSD, but -imo- with less of an attitude problem and a more polished up to date product.
Given the pleasant and easy PC BSD experience, I look forward to trying the straight FBSD soon. The DBSD install is equally easy, but the above points prove drawbacks. Actually the main point in not switching to traditional freeBSD is my laziness in the event I need to reinstall. I don't mind working on my system, but hate long drawn out installs. I find PCBSD to FreeBSD what Ubuntu is to Debian. DBSD may soon go the way of kanotix unfortunately.....not, these days a pretty sight.