I think it should be illegal for non medical purposes, and dealers should face strong repercussions. I think medical marijuana should be legal, however I think the qualifications to receive a medical marijuana license should be strict.
My history...
When I was real young my sister came to me and told me "your gonna get high some time, it might as well be with me your first time". We went and got high, and then it turned into an everyday occurrence. By the time I was in junior high I was dealing, and I did so all the way through school, and afterwords. I took a break from getting high and stayed clean for about 3 months. Then in 2004 I had a major seizure, I was foaming at the mouth, quit breathing and turned blue. An off duty EMT stopped and brought me around, the doctors said if it wasn't for him I would have died, or been permanently brain dead. After the EMT had revived me, an Ambulance got there, my sister turned thank him, and he was gone. The other EMT's said they never say him, I later searched for him, looking at fire departments and all the EMS services in the area...But never found him. He is one of the reasons I became an EMT.
Anyway I am getting a bit side tracked. The neurologists said that my brain walls were too thick from all the concussions I have had. They put me on meds, but the side effects were horrible...I either couldn't go to the bathroom, or felt like harming others or myself. Finally they put me on medical marijuana, it took 4 months for me to get my brain walls thinned enough, and I have had to relearn a number of different things (like vocabulary, parts of my speech, etc). However I stayed on marijuana far beyond the period of time that I needed, and I abused the system.
It wasn't until later on in life that I actually got off of weed (as well as alcohol, and other poor habits).
I only share this so that you know that I have experience in this matter.