OMG I *HATED* Mirtazapine - I got so so fat, it was horrific. I ate anything that wasn't nailed down to the floor! I slept 18 hours a day, and then just ate constantly the 6 hours I was awake. I'm impressed you didn't gain weight on it Crazylife!
I was on sertraline for ages as it was one that made me feel least horrible in terms of side effects, but didn't actually help the depression. I started on 50mg and went up to 200mg and stayed there for months. Starting caused the typical SSRI side effects of nausea and headaches etc. After several months I started getting joint pains all over my body (arthralgia is listed as a side effect of sertraline) and so I came off it. I can't 100% say it was the sertraline though as I do go through achy times with my depression. I'd probably still be on it now to be honest, if I hadn't insisted that it wasn't helping my depression (my pdoc at the time couldn't care less).
Good luck with it Crazylife
*Willow*