I see myself embarrassed by reading this topic. I just can´t go along these games. They´re for lifeless people!, what the fuck?! I mean, it´s ok to look upon younger people, but why don´t you just go out your house and staring enjoying real life?
I mean, "dates" may be fun enough, but trust me, why´d you be in love with a computer? What about the physical contact, the feelings (which should be always real...!), when she(or he) bothers you to go out, enjoy time.
Would you even say: "Hey! Here´s my new girlfriend!", she loves me, oh wait low battery charge, I won´t eat until she does ->
Most people - by which I mean ~70% of the small group who even plays any Dating Sims at all - wouldn't go say "Here's my girlfriend, I love her so effing much~!!1!".
They /know/ they're not real. However, knowing that something isn't real doesn't mean you can't enjoy it.
Please, don't generalize. Not everyone who plays these kinds of games are lifeless.
(Sometimes I really think people should watch "ore no imouto ga konna ni kawaii wake ga nai". It'd open up their minds to this kind of things, at the very least - instead of going Instant-dislike. >-> )