This won't be very uplifting for the menfolk so look away now......
If you were young, I think 19 - 35 getting diagnosed, if your initial symptoms were visual (i.e double vision, ON, nystagmus) or had vertigo, had a low amount of lesions on initial MRI or few or no changes on subsequent MRI's and you're female, you're long term prognosis is excellent. You just need to hold on to that frame of mind. Not every person with MS will develop ON, similarly not everyone will develop weakness.
2008 was my diagnosis (September), had another scan 18 months (ish) later and no changes. I also quit my Betaferon over a year ago. Hope I don't jinx myself now, but I haven't had any relapses, bar a numbish hand last Christmas. I did get what I thought was vertigo in March, but on researching it before going to the GP I found my symtoms were more BPPV like and I was right. If I hadn't gone armed with that info, my GP might have just given me the oral steriods for MS/vertigo. I'd only get dizzy when I tilted my head a certain direction.