Okay, here's the top ten tags first - logs forthcoming. Caveat: Paddy's logs are nowhere nearly as well-tagged as some of my other alts and because I've been playing him since 2004, I am actually missing large chunks of his logs and not all of his logs are on LJ to boot.
1) Jekzith - 323 uses
In which Jekzith and June carry on a conversation through Paddy.
http://jekzith.livejournal.com/167528.html 2) T'mic - 209 uses (wow. we sure do play a lot.)
3) aath - 88 uses
4) #awlm - 64 uses
5) palia - 59 uses (combining with the npc tag)
6) r'us - 49 uses
7) javeri - 48 uses
8) illya - 45 uses
After everything fell apart, things were awkward.
http://jekzith.livejournal.com/48954.html 9) piper - 42 uses
10) persie - 40 uses