My favorite use of my damage meter as of late:
Seeing how much DPS my shammy healer alt gets from keeping a shock up.
I also found out that after about level 30 I shouldn't put in LFG as a DPS while I have a resto spec. The differences start getting big!
On my warlock (yes, I'm one of
those people), however, I haven't linked a meter in party/raid chat unless asked. Except once... When the Raid Leader was complaining about the Holy Pally's healing, I linked the cleansing meter. Our raid healer was at about 3 or 4 to the other Pally's
96. QQ was instantly redirected.