Now i use

• 10.04 LTS
  • Ubunu Netbook Remix

Rarely i use

• 12.04.01 LTS
  • Ubuntu Desktop
  • Lubuntu
• 10.04.04 LTS
  • Ubuntu Desktop

For testing

• x/Ubuntu Desktop
  • 12.04
  • 11.10
  • 11.04

Previously

• Xubuntu 12.04 anno 8.10

Some periods used (in order of prefference)

• Crunchbang till ubuntu Crunchbang
• LinuxMint 10 till 12
• MeeGo
• Fedora
• DSL
• BackTrack 3, 4, 5
• PuppyLinux
• Kubuntu 10.04