I dyed my hair from 15 or 16 to 23. I couldn't remember my natural hair colour anymore. My ex asked me to go back to my natural colour for our wedding. The wedding never happened, but I've grown to love my own colour. I used to highlight and am bound to do it again.
I haven't ever dyed my hair or had it highlighted. I balk at the $20 I pay to have a great stylist that won't screw up my hair just cutting like was done at even cheaper places. I couldn't imagine, for myself, wanting to spend the money.
I'm lucky enough to have my (awesome) hair dresser as my very own best friend so YES, I dye mine all the time... I've been every (normal) color under the sun, I love changing it up.
I never coloured my hair (did have some disastrous perms though over the years) until I started getting grey hairs. Finding it hard to find (and keep) a good hairdresser in a salon I now get my hair coloured and cut by my Dad's next door neighbour when I visit. I'm way overdue but am planning to visit in a couple of weeks.
I get bored, so yes I do color my hair every once in a while, but I am naturally really (really!) blonde, so I that's what I tend to always go back to.