New issues keep getting brought up like crazy in this thread! I can barely keep up!
Okay, on being like your parents, not always a good rule of thumb. My sister is a bit like our aunt in her personality and temperament in terms of not thinking things through or planning ahead, making frivolous purchases, going for the whole get your hair and nails done thing, and flying off the handle for fairly minor things. I don't know who I take after...my father a bit, one of my grandmothers a bit, and probably a healthy dose of both grandfathers. As my father and one set of grandparents has already passed away, you're not going to learn much from observing them about what I'm like. My mom and I tend to be polar opposites. She's someone who revels in gossip while swearing up and down she can't stand gossip, she cannot keep a secret for her life (if I want to quickly and efficiently share news with the entire family, I just have to tell my mom), and she gets ridiculously worked up over really minor things...everything is stressful if you take her word on it. My step-dad and I have a running joke when she starts going off and blowing up some insignificant issue...he gives me a look of exasperation and says, "She's your mom." I reply with, "It's not my fault. I was born with her; you actually chose her, and I tried warning you."
Of course, there were some things my mom did right in raising me, obviously

, but a lot of things that I turned out okay
in spite of. I do have pretty strong opinions about how children should be raised (is there anything I don't have strong opinions about?), so, yeah, finding someone with compatible views on that is important to me. Everyone will bring their own views and approaches to child-rearing, and it doesn't hurt to have alternative approaches if one way doesn't work, as long as they aren't completely incompatible.
As for knowing how someone will cope with children, that's where observation can help. When you attend family functions or other gatherings where children are present, does the person you're dating avoid the children, complain about all the screaming, look like someone just handed him nuclear waste if they ask him to hold a baby, start gagging if the diaper is dirty, etc.? If so, he's probably not going to be a lot of help with a baby, or is going to need a lot of coaching before he's comfortable with it. On the other hand, if he's just awkward when handed a baby, but tries cooing at it, or reads stories to the children, or just doesn't shun any room with children in it, he'll probably be okay. And some people are just naturals with babies...or maybe they just started out being around babies a lot when they were young...maybe in a large family with lots of siblings, or younger cousins, or their mom babysat, so they already know how to put a diaper on right-side-up, and can get a wriggling baby into a onesie...or they actually know what a onesie is.
Me, I love infants and older children, but don't know what to do with a 2-year old...that's when they're at that stage where they're fully mobile, have definite opinions of what they want and don't want, but lack the verbal skills to tell you that. That's also the age where they want to play the same game for hours and hours and hours and hours, until any sane adult is going to crack if the kid doesn't take a nap really soon...and of course it's the age when they don't want to take naps even if they really need one.

But, all the good daddies I've seen seem to do really well with children at that age, so that'll probably work out fine.
On Dr. Phil and self-help books. I think Evo said it already, if you have to learn it from the book, you've got far too many problems for me to want to deal with. Developing relationship skills is something you should learn your entire life, through your social interactions with others, including parents, siblings, classmates, teachers, other friends and relatives, eventually co-workers, and from observing the relationships around you that work and don't work, as well as through dating. It's rare for someone to marry the first person they start dating. Dating is also practicing being in relationships. It helps you find what you like and don't like about potential partners, as well as gives you opportunities to learn from your blunders for when you meet the next person.
As for that example given above of the guy with 6 female friends, I agree with Evo, it's the wife's problem. She's obviously insecure about the relationship and jealous. Her husband shouldn't have to give up his friends to be married to her, that's just nuts. If she has a legitimate reason to suspect infidelity, then she should just dump his sorry butt, not sit around moping because he has female friends. He should probably just leave her, because she's too psycho to have a normal relationship if she suspects he's being unfaithful with any woman he's friends with.