is there a list of emotes anywere? If the one at DDOwiki is accurate, that's a pretty pathetic selection. There's not even a /thank. One of the few things about WoW that actually facilitated roleplaying for me was that I could communicate frequently and fairly effectively through emotes, and rarely ever had to speak.
If it is, then
/thank
/agree
/disagree
/halt
/charge
/nodhead
/shakehead
/grin
/smile
/wink
/frown
/snarl
/scowl
/roar
/shakefist
/threaten
And some class specific ones as other posters have suggested wouldn't suck.
/bene "<CHARNAME> gestures <at %t> in benediction." (animation: for CLR, PAL and FVS - character raises its arms and is spot lit from above or below)
/juggle "<CHARNAME> juggles to pass the time." (animation: for ROG - character juggles knives; for SORC - character juggles little balls of fire)
/rage "<CHARNAME> bares <his/her/its> teeth and bellows <at %t> in rage!" (animation: for FTR and BARB - character thrusts its chest out, its head up and yells)
/cantrip_fire/ice/lightning/sonic/acid/necro (animation: for WIZ, SORC or BRD - some minor prestidigitation effect involving the energy source supplied after the underscore)
/fiddle_flute/drum/guitar "<CHARNAME> passes the time with a tune." animation: for BRD - play the instrument supplied after the underscore)
/meditate, /meditate2 "<CHARNAME> seeks tranquility." (animation: for MNK and RNG - sit in a half lotus position. IF 2, the character hums or chants a mantra)