I always wanted 3, but now that we (almost) have 2, I think we are done. I absolutely hate being pregnant, and it's hard on my marriage. However, the biggest reason is that I want to be able to help pay for the girls' school (hopefully private middle and high school), college, and weddings. Not to mention, I hope to help them buy their first car, put them in extracurricular activities, etc.
I am one of three, which I guess is why I always wanted 3. My family is big and loud, always in your face, and just crazy. Ha. I love it! I still think it could be fun and crazy with just 2 though, especially when they're both married and have kids of their own. I think it's harder for me to accept having only 2 b/c I have always had a big family- my grandma was one of 11 (so I have a TON of extended cousins), my mom is one of 4, my dad is one of 8.... However, when I think about how much I love my girls, I feel like I don't want to risk not being able to provide for them. Not to mention, dh and I would like to be able to retire at a decent age and have enough money to travel.