If you have thick hair, I think you should consult a hair expert in your salon to assist you in the best way to style it. He or she will give you different proposals on how well to style your hair for you to look your best.
i have really thick hair too. for a shampoo i would use Wen, its a bit expensive bit if you use it right its great. and i got a haircut called a "diamond haircut" which really looks good and helps with brushing in the morning. (i have really long hair, so idk what to do if you have short hair)
Well, my friend has extremely thick hair and she doesn't really like it. I would go to a salon so THEY can thin it, but if you want to do it yourself this is what you do: You take a razor and just stroke your hair with it (but not to many times!) and your some of your hair will come out. That's what my friend did and it worked for her, but I recommend just going to a salon.
I used to think the same thing and I was so jelouse of my BFF cause she had pin strait hair. But then my mom told me that when u get older, your hair thins and u loose it so those with thin hair wind up loosing hair quicker and more. Also if your really unhappy just straitened it!;)
Accept what you have. Usually people with thick hair want thin hair, and people with thin hair want thick hair, but if you truly want to, you can get your hairdresser to thin it for you:) hope I helped!!