I have a E/Mo, W/Mo, R/Mo & a N/Mo and I have yto say that I split my "favorite" character between my N/Mo & my E/Mo.
I love my E/Mo because she is a pure damage dealer who can take out groups of critters! Assuming I can get the enemy to bunch up (quite easy, even with only henchies) then they die very, very fast... Heck, even if they get a bit spread around I can still take them down fast. Only problem with her is she's a bit fragile if she can't get the aggro onto someone else.. but even then has a nice abilty to kill them with some PBAoE smackdown! But really.. the pure and unadulterated joy of smacking down those high damage spells and wiping groupos out... oh yeah baby! hehe
My N/Mo rocks! Taking things down 1 at a time is great! But doing so in a fashion which keeps my own health up is great! Summoning meatshields & energy batteries for extra help is a blast when I'm in a hard fight. In fact, this character just laughs at death and laughs when the rest of the group dies... kills the critters and then rezzes them

Seriously fun for me.. and funky that I worry less about if the henchies/groupies I'm with die in a fight.. even Alesia/healer-monk ... I can keep myself healed and kill critters! wheeee!
In fact I just had fun getting to a certain ghost NPC with my N/Mo.. it had been put at the top of what could be a temple? like area - it's in Diessa Lowlands, down in the lower left corner.. south of where Garfuzz is... you get there by crossing a bridge.. there's usually 3 or 4 bosses in the area too. (this was the hardest place the game has ever put that ghost at for me..). Gotta say it was a huge challange for my lowly N/Mo to do it.. and in fact the henchies all dies and I died once as well.. heh.. but I got through it.. was great fun trying to pull small groups out of the masses, using life stealing and syphoning to keep myself healed while killing things.. summoning Minion's to act as meatshields and bonus damage as well as important boost's of energy when they died.. wheeee! Funnily enough I killed 80% of the charr there solo with the henchies being dead.. hahahaha! They made good corpses for minion summoning! hehehe