How do most Indian families pressure their kids unknowingly?

I have been a fairly good kid for the past 22 years. And yet my parents expect me to be even 'better'. They have this ideal kid in mind and if i don't match up to the standards, i become the 'bad' one. Honestly, until recently I myself was that ideal kid! They used to proudly announce it to the world and they also used to expect my younger sibling to 'learn something' and 'be like me'. But then, one day I decided to be 'myself'! You see thats the mistake i made. I wasn't allowed to do that! Hell i wasn't even allowed to think of anything like that. They have this whole life planned out for me and yet they say 'you are the master of your life'! Who are they kidding? Seriously! Just because I've been an angel all these years doesn't mean I want to lead my life according to their ground rules! True, I'm already 22 and I haven't achieved so much as yet. But I do have dreams! Dreams of becoming something that would change atleast a small part of the world in some way. Sometimes I think I'm just being really greedy and selfish for wanting more and for thinking that I may actually have the potential of being someone who I've always dreamed of! Yeah well thats how my parents make me feel.. I suddenly become this arrogant self-centered bitch for trying to follow my dreams! I swear.. I really don't know how this works. I'm scared for sure, because I still don't know whether following my dreams is the right thing to do or not. You see I will be disappointing a lot of people if I chose to do that. And among those people include my parents, who I no doubt love very much but sometimes I have to do whats best for me.

They say I haven't seen the real world and I just talk impulsively and arrogantly and if I don't do precisely what they say, I will definitely get in trouble because as always, they know whats best for me! Its funny sometimes when they ask me why I didn't clear a placement test when my friend cleared it with ease. Its not that I planned on screwing it, its just sometimes I'm not that good enough. I don't know why they cant accept me they way I am. Why cant they let me make my own mistakes and learn from them.. Why do I have to learn from their mistakes?

And then there is Karma. Or call it God as they do. It seems 'What goes around, comes around'. But when you think of doing good to yourself, there is every chance that someone will get hurt unintentionally. So does that mean I am a bad person for thinking about myself? Isn't the Real world all about survival of the fittest? I really don't understand whats right and whats wrong sometimes.. It just doesn't make sense!

Maybe I should just stick to being the 'good girl'. Maybe thats the way it is. And I'm good at being that. I do have a lot of experience you see. My dreams are, well just dreams I guess.