Have KOffice, Kontact, Plato, Quanta++ (for web development), Latest FireFox & Thunderbird (though I prefer KMail),
I'm not a huge fan of Thunderbird either. You can get KMail by installing 'kdepim' -- but that also gives you several other KDE applications (that you may not want). Included in KDE PIM is: Kontact, Akregator, Blogilo, AddressBook, KAlarm, KJots, KMail, KNode, KOrganizer, KTimeTracker, kabcclient, KonsoleKalendar, Kandy and KPilot. (Read about it here: http://community.kde.org/KDE_PIM
). I used to like KNode but am used to Pan now. Instead of Thunderbird I use claws-mail (but most of my emailing is done on GMail and Yahoo Mail).
VectorLinux is my favorite Desktop Linux -- but I still tri-boot to CentOS (second favorite now) and Linux Mint (my Dad uses that, so I need to be able to support him via phone). I also have Puppy Linux and JoliOS on flash drives. I like Fedora, but it's a bit too "cutting edge" for me (too many downloads).