Overbearing mother--or is it just me?

Ever since I was little I have had a loving mom who is always there for me---sometimes more than I would like though. I know I should be happy because some people grow up without any parental support but sometimes I feel smothered. Is this wrong of me? When I was little I wasnt able to do a lot of the things other kids did. we never went out many places and Ive never been on a vacation to anywhere yet alone left the area that I live in further than a 4 hour drive. I used to want to do things outside as a kid like climb trees or splash my feet in the mud on a rainy day but my mom would freak out and say I would break my arm or catch pneumonia and I wasnt allowed. For this many people have always told me that is part of why I am like I am today. Im sort of like chuckie from the rugrats (if anyone remembers that show) where he is very worried and always the one to say "well I dont know about that" and I hardly take necessary risks in life because Im too afraid. Normally I try to just go ahead and do everything mom tells me to do- mainly because Im her daughter and that's what a good daughter should do. but sometimes I get annoyed and don't do what she says- especially in the past few years and here I am about to turn 21 this year (yes, I still live at home, I have a job and go to college but my job isnt enough to support me on my own and my mom would most likely take it as a personal strike against her if I were to leave without going off with a husband or something). For example: I try to help around the house by cleaning the dishes or vacing the floor but it's never good enough for her. She looks at it and will knit pick every little thing about it. When I wash dishes she says I didnt do it right because I didnt do it the same way she does it (same with ironing clothes---we both get the SAME end result- but I just do it in a way that is easier for me and faster---just that I dont do it the way she did it and the way her mother taught her doesnt mean it's the right way for me). So she rewashes the dishes or revaes the floor. This just makes me not even see a point in helping out around the house and I end up not doing it. Ive also gotten into a bad habit lately. I get on the internet late at night and stay on there til about 3 or 4 in the morning and I end up sleeping in until 12 in the afternoon. Though I do believe that it's up to me what I want to do and I tell her that- but every time i sleep in she comes in the room begging me to wake up and saying tings like "you're so lazy, you gotta get up- you're not the same little girl I used to know- you've changed, you used to be an early bird n wake up early every morning. I dont know what happened to you. there IS something wrong with you- I KNOW there is- tell me what it is." and I tell her that I would have 2 make something up and it would be a lie because I couldnt think of anything wrong with me other than her nagging me every morning to get up when she wants me to. I know she cares about me- but Im responsible- if I gotta get up- I'll get up- I always prepare for things or am able to get up n be ready if I have to- but if I can sleep in I do it lately. and she gets sad and teary eyed and says " I dont even see you anymore- you're always in this room. You must not like me anymore, you dont like being around me" and all this stuff. The thing is- I have this room that is sort of like my bedroom but it's called the playroom. I have gaming stuff in here and a computer and all the commodities that I like to do. My dad watches the TV in the living room and puffs a thick cloud of cigg smoke in there so I never want to be in that room anyway. There really isnt much to do at our house so I get bored and this room is just my escape. Mom is normally sleeping because she worked too much or she's in the kitchen cooking or cleaning or cussing out my dad (they dont have a good marriage- my dad is a lazy bum who will never do anything unless mom helps him and that makes them both angry. My mom has to put up with a lot with my dad and prolly from me too because I stay in this room all the time- but I do cmoe out- I eat dinner at the table with her we go out together sometimes. Lotsa my friends have moved out of their house and are on their own now and my mom is worried that I dont talk to her enough. I mean---maybe I dont- Im just so confused. I feel terrible. Like the other day I felt terrible. I wanted something 2 eat but there was nothing at the house- the original plan was for me 2 buy food out but then my brother and everyone wanted to join in (mom, my brother, and me) and go on a take-out run together. I know how that normally goes- something happens and someone gets mad (normally my brother) and he ends up cussing us all out saying something like "f*cking hate all of you" or something that he ends up regretting later (he has temper problems) and mom and I get our feelings hurt and none of us have a good time (my brother is 24 btw). So I was hoping we could have