Autodoll wrote...
Add me to the list of players who didn't kill Anders, and it's pleasure to meet you. 
I've actually never wanted to kill any of the mage companions in DA. Wynne was a little preachy and sanctimonious, and I killed her in my "OMGChantry!" mage playthrough, but not any other time. I liked Finn, despite his squeamishness, Morrigan was like my Warden's bff (and every male I made was with her romantically), Sketch was adorable. Jowan... was kind of a moron for getting involved with an initiate, but I can't help but feel bad for him (again, I've only betrayed him in my loyalist mage profile). And even though I hated Velanna at first, she grew on my and I grew to respect her character. Anders has been a favourite of mine since his reveal for Awakening. Although, Irving did irk me. A lot. Other than that, I like the mages we've been presented in Origins.
Even in DA2; although Bethany annoys me (mostly because my siblings are more like Carver, the creepy perfect sister is not what I'm used to), and Merrill is like an adorable little hamster; painfully naive, but my Hawke can't help but want to protect her little replacement-sister (I play as a mage), even though she's dangerous. I understand if these characters annoy you, I can see how they would considering how many of them betray you in the face so often, but... No, I didn't want to stab every mage. Whiney nobles and bigoted priests? Where be mah murder knife??? 
Edit: Smiley emoticons! 
The whole point was, "why is there no 'fun' mage?" There isn't a mage out there that you can geniunely like. As you said, Merril is adorable and having her follow you around leads to interesting conversations with other party members, but she's like an atomic kitten, you never know when it's gonna hit the fan.
Anders goes psychotic, Wynne does get on your nerves, Morrigan has that nasty habit of voicing her opinion at the exact WRONG moment, Bethany is just creepy, (ANYBODY that nice & understanding is hiding something), Irving and Orsino both just seemed dejected and run-down, (they have every right to be, but still). I agree Jowan was misguided, Sketch was too afraid of his own shadow, and Finn needed a good dirt bath, but other than that, he was okay.
And then you look at the rest of the characters in the world and there's somebody out there for everybody. Zevran, Varric and Isabela are definately the "good times" folk, Sten and Fenris are single-minded battering rams, Alistair for people who enjoy lost puppies, the list goes on. Yes, I'm sure there are people out there that didn't like this one or that one, but the point is there were people designed for you to like them. I truly don't think any mage was. Just wondering why.