i use the ring now, and i love it. i don't skip a week (new ring ever three weeks) so i can skip my periods. some women don't realize you can skip your period with any BC and it's perfectly healthy, in my case it *may* actually be saving my fertility. **crosses fingers**
i've been on a lot of different BC because of my health issues (endometriosis, ect.) i like the ring because it's very low dose since it's absorbed differently then other BC.
depo provera isn't the answer for everyone, i was on it for almost nine years and DO NOT recommend long term use. it screwed me up big time, but it also probably saved my life in other ways. it's great treatment for endometriosis (which is VERY common btw) and roughly 80% of women stop having their period while they are on it. ((hence the saving my life)) if you use the shot, i highly recommend taking a few months off every few years. not bleeding for so long eventually cased my uterus to start deteriorating, which caused me to bleed for nearly six months straight. not good! depo also can lead to bone loss so if you take it you should also be taking calcium and vitamin D (which we should probably all be taking anyway).
if you are sensitive to estrogen the shot is estrogen free, as is the mini pill (or pop--progesterone only pill), implanon, and i believe the mirnea IUD. these types of BC can be good for women with endo or migraines--or other estrogen sensitivities.