I may act most of the time as a fanboy but, believe or not, I am deep inside a balanced guy (am I?) so a cold shower from time to time probably does not hurt, I guess I can share bluntly my first impressions after living a bit with Fedora 13 (beta/devel).
One of the main reason I use Fedora is the 3-rd Foundation, the features, so if in the past I used to jump with my main desktop to a new release around Beta, this time I felt unmotivated, not only because I was busy with the life, but also because for the first time in all the Fedora history the features list didn't have anything to bring butterflies in my stomach.
Ultimately, I built the energy and installed it a couple of days ago I accumulated enough energy and installed it. It was a big disappointment, from the look (I don't like the new icon theme and I hate the new cursor theme) to the need to re-learn old habits (never though it will be so hard to use again a file manager in browser mode).
Beyond the superficial look and feel, which can be easily changed, I encountered loss of functionality which keeps me from getting work done, one example is gThumb, removed as the default but still easily installable, does not have any more the feature I used the most: export as a Web Album. I guess I will need to use some script for it. Similarly, Gwibber, not a default any more but still installable, lot the ability do watch any RSS feed, something I was relying on and became useless to me, with this reduced functionality I can stay very well with the default, and much lighter, pino.
Initially my plan was to write this in a different tone, highlighting one thing that I really like, but after 24 hours of intense use, weren't able to find such thing so let my crankiness out. But I will live with it, I don't have any plan for going back to 12, instead will move the netbook to F13 too in a few days. I am self-destructive like that :p