First off...yes we are all this uptight...it's our right to be so. Second, we usually have a good reason to make the choices we make. You have listed that the people you are with are all great people...they probibly don't know that...and I would lie about it if given the chance, which my Mom knew.
I can't say what they are doing is right or wrong, because they are the boss. But I can give you some advice about ways to open communication with them.
First you need to talk to them...not argue, or try to make yourself look better by comparing to other kids (they aren't you...). Second if you can get through that part, ask them if there is a way to compromise the days you can spend out late. If you are sure to be home every night during the week before curfew except one day, would that be reasonable? Then you need to pick a day ahead of time to make plans and then ask themabout it...
I can't really say more because you have to get through that part first. And remember, they aren't just worried about your actions but the actions of other people here...you see what you want to see being the teenager you are (same thing I did when I was younger), they see what other's do and how that can effect you without you even noticing.
In the words of my Mom (who at 18 made me be home by 10 p.m. every night...unless my plans were made by 7:30 p.m. with a name number and address):
If you think you have it so rough, go live somewhere else and make your own rules...
OR
If you think (insert friends name here) has such a great life because his parents don't give a rats ass...go live with them...I'll even help ya pack your bags.
In other words, it's not that bad, and there is a reason..like it or not. Just tough it out for a bit longer and you can do whatever the hell you please!!