Solaris 10 really rocks!
On a daily basis, I work with two laptops. I have an Apple Powerbook 12" and a Sony Vaio PCG-GRX700P (yes, this is the model number, but Sony has so many of these models with different combinations of letters and numbers that it almost feels like a serial number :). I use the Powerbook for e-mail, browsing, etc. and the Sony for development. I have been using various flavors of Linux for over ten years (yes, I still remember my first installation using two dozen floppy disks :) and I had Suse with JDS running on the Vaio for the last two years.
It was time to upgrade my Linux installation and I thought, hey, let's give Solaris 10 a try. I went to the download site and got the DVD version which is downloadable in 5 segments. I picked up a powerbar as I was getting ready to start fighting the installer only to find that I would need to burn all that energy doing something else. Yes, it installed without a single hiccup (granted, I don't have a wireless card on the Vaio) and I was up and running in no time.
After the OS, I installed the VPN software, the latest Netbeans 5.0 beta 2 (still throws some exceptions now and then) as well as Sun Studio 11 for C/C++ development. No problems.
I was impressed already, but it wasn't over yet. The first thing I noticed was how fast the network was. Having used the exact same hardware with Linux I had a well-known reference point. Telnet was flying and so was CVS, SSH and NFS. Then I started opening applications, and for the first time ever I was able to run the Gnome desktop, Glassfish (AS 9.0), Netbeans 5.0 and Sun Studio 11 all at the same time without any noticeable thrashing. I was sold!
To summarize, after just a few days, I'm ready to proclaim that Solaris 10 is the best development platform I have ever used, and most likely (given that I've tried most of the others) the best development platform in the market today. But don't take my word for it, stop acting passively and try it out yourself!