I don't have a favourite, but a few stand out for having made an impression on me;
Sarum - you are amazing , so strong
Sassywitchy - I miss your voice of reason!
Blizzie - how funny are you
really witty!
Barolo, Heatseek, DL, Suzy ... anyone sensing a pattern here ...
Tina - what's going on in your life woman, I've lost track!
Superslug - where have you gone?! I have shopping to be done!
OHG - I love your BNP stance
China - I've told you before, I like the cut of your jib ... (do we know what a jib is ?)
And what ever happened to Hippychick?! (She always posted in purple)
There's loads of other FM's who make me laugh or think or question, but these are the ones I actually remember the names of! So there you go, for what it's worth!