Why do people on Dating websites all seem the same?

I was browsing places like eharmony and other similar personals places and it seems to me that everybody is trying to sound the same. Are we all Communists? What happened to free thinking and being different? Everyone says how they love thier family and cooking and blahblahblah. Have you noticed this too? I know there are tons of lonely people out there who are looking for someone to share life with and thats fine. but we gotta stop trying to hide our bad side and only showing our good side! You wont sound like a lunatic! you will only sound like you! and there may be a lunatic JUST LIKE YOU! what do you think about this? lets let it all hang out...It would be awesome if there were some people who stated in their profiles that they arent looking for long term relationships just someone to hang out with and get high and watch cartoons!!