Ok so do you dye your hair? If so which colour do you go for and why?

I recently started dying my hair again (I used to dye it black or super dark blue all the time when I was younger) I'm dying my hair because at the age of 29 I'm going very grey! Which is not a good thing. I've been using Just For Men (not even kidding) to get the grey to go back to brown! Still at least I've got hair right?