My desktop.

$ history|awk '{a[$2]++ } END{for(i in a){print a[i] " " i}}'|sort -rn|head
127 cd
115 ls
30 dig
23 wine
23 vim
23 rm
16 sudo
16 mv
14 mplayer
11 python2.5

(so wine, pr0n and python…great!)

My personal server

# history|awk '{a[$2]++ } END{for(i in a){print a[i] " " i}}'|sort -rn|head
58 vim
34 ls
34 mutt
31 dig
20 ps
20 apt-get
18 dpkg
17 tail
17 route
16 su

(Debian! Debian! Debian)

My laptop

Well.. laptop is sleeping :-)