Nuva ring or Depo-Provera?

I have a gyno appointment in the morning, and I'm thinking about starting a new birth control. One that I don't have to worry about forgetting to take. I was on the Yasmin before, but I had trouble remembering to take it on time. I was reading about the shot and the nuva ring. Everyone says the shot, makes you crazy and gain lots of weight, and nuva ring seems to slip out. I'm 21, I'm tiny, and I do use condoms so I'm not worry about it not being 100% effective, 99% is good enough. Also, I only gained 4 pounds when I was on the pill, but some people said they've gained 20 lbs on both the ring and shot. But I don't know which would be better? Ladies, what do you vote on?