Personally, dealing with hair dye is way too much work.  It doesn't seem too bad when you have just a little gray, but once you start really going gray, you have to keep up with it or you have terrible looking roots.  Then if you decide to stop after you are near full gray, you look horrible for a year or more.

I've never used hair dye and never will.  I'll admit I'm probably going gray slower than many, but I have better things to do with my time and money.  

The bad things for people like you that have black hair, is the grays really show.  The good thing is they almost always go a beautiful silver.  Those of us with lighter hair don't show those few scattered grays when they first appear, but tend to have dull, dingy gray/off-white hair once it goes full gray.

I'd say embrace it.  Claim your wisdom gained through a few years.