The kind of girl you'd want to marry??

In your opinion is there a difference between the kind of girl you would like to marry and girls that you just want to mess around with?????

Here is why I'm asking..... my x wants to get stuff out of his "system" and is going out with different girls... I got advice from this really nice lady who told me that we still loved each other and these girls mean nothing to him. She also said that I'm the type of girl that he and others look for to marry, because I don't have a bad reputation...blah, blah, blah. I love my x a lot, but I'm not going to sit and wait for him, so we'll see what happens. Ok, enough about me...

But, do you guys really look at girls and think that she is the wife type/not the wife type?