I've always had long hair and started to grey in my 20s. Dyed it for about 25 years (dark warm brown), had to dye it every 3 weeks because of the amount of white showing upon grow-out. One day I took a really close look at myself in the mirror in some harsh, bright light...and came to the realization that the dark hair wasn't fooling anybody about my age but me! The "roadmap" that is my face told the truth of the years. LOL!
Had my stylist whack it off to about 1" all over my head (cut off most of the color), then let it grow back long, but it's natural color. Does it make me look older, yeah, maybe...but I AM OLDER NOW!! I do get compliments on the natural color...surprisingly a lot of them are from men (women too)! Who knew men even noticed a woman's hair color??
I'd say, go for it....try grey. If you hate it, go back to coloring it. Be aware, however, you may need to change your make-up and clothing colors once you go grey. If your colors are too subtle, you look washed-out. Too bright and you look like you belong on Clown Alley. It's a fine line there! LOL! Good luck.