
For a bit of backgroung info:
Up until recently, my hair was mostly straight, but for one thing - it was very "poofy". See my avatar. No matter what I did to it, it was very poofy and bushy. I figured this would end with length, so I kept growing it, and trying new things to straighten the ends.
Well, something I did must have done the trick. Because about a week and a half ago, I washed my hair, and went to sit otuside and let my hair dry naturally (it was ~70 degrees out). So, after 2-3 hours, I came back in, and my hair was wavy at the ends. I thought it was a bit odd, but figured that when it dried totally, it would be its usual self.
However, by that night, it hadn't straightened a bit. And even the next day, it was wavy. And, 3 washes later, it's STILL wavy. I haven't changed my hair routine at all, and I have no idea what could cause this change - but I really like it! My hair was always in the middle between wavy and straight, and it's like it finally decided to get wavy!
Picture up top, but it's not very good...my webcam's pretty bad. I'll post one or two more in a sec.

Second pic, from the side.

And, just for fun, a pic of me when I was about 3 or 4. My parents always kept my hair kinda shaggy. Also, I can't believe I used to be blonde!
Looks nice! I've noticed that whenever my hair was at ear's length, it had a little flip on the ends. As it grew out, it developed into a subtle wave, similiar to yours. The only things I changed as my hair was growing out, was only shampooing once or twice weekly and using more conditioner, every day or every other day. Not sure if this is what's causing it. Another thing could be is just as the hair gets longer, it changes by itself. Just a thought...
--Rick
Funny, because a similar thing happened to myself........and it was PAST the 2 year mark when it happened. The ends just would not straighten, (and I was in no way using devices to "try" and straighten either.)
Suddenly, by mid back all ended-up "straight" and has been that way ever since.
Most likely it had to do with gravity I think. Thanks for telling us this story as I had thought up until now that I was the only person that something similar had happened to me.
One never ceases to learn.
Hair acts different at different lengths. This is why you have to grow your hair long (and longer) in order to really know what it will be like that way. How it responds to hair products also changes.
Some guys will grow it out a few inches and then decide that they don't like it that way...only they never managed to grow it long in the first place and don't have a real idea of what their own hair does at longer lengths.
Growing long hair is an ongoing learning experience.