No way will I let my grey hair show through. I am middle aged, and I had bits of grey starting to come through at around 42-43, and I started dying my hair then. Maybe I won't give a shit when I'm 65, but in my middle age, not even 50 yet, no way.
I agree with the posters saying grey is rather ageing. It's OK if you're say, over 65, but being grey younger than that is quite ageing. Some women look OK with grey hair, if it's styled/cut nice, but I have yet to see a woman with grey hair who doesn't look at least five years older than she is. They never look younger.
I know some women on here say they are happy to be grey, even in their 30s, but I can count on the fingers of one hand, the amount of women under 50 I know, who don't dye their hair... (And even the 3 or 4 I do know, are in their mid 40s. None any younger than that.)
As for the OP's husband making the comments, and saying 'NO'.. I think if your husband is demanding you do (and don't do) as he says, then you have bigger issues than whether to have your grey hair grow though!
I don't know if it would bother my DH or not. It's never come up as I have never let the grey show. I don't think he would care to be honest. But I do. And that is why I dye it.