My experience with lovebirds has been mixed. I have seen sweet lovebirds, and I have seen nasty lovebirds. I used to work in a pet store that would no longer carry/sell lovebirds because of a bad experience. Apparently there was one murderous lovebird in the cage, and it murdered all of the other ones. That story really stuck with me.
On the contrary, I have met very few cockatiels that are aggressive--just a few males. I have known several females though that bonded exclusively with men. You might be able to find a sweet little sensitive cockatiel that your husband would love! There are so many that need good homes.
I think the temperament of any bird is going to be more or less unique to the individual. There are sweet amazons, and monster amazons. With a baby, you have more control over the behavior early on, but there's no guarantee that the bird isn't just naturally a jerk! Adopting a bird can go either way as well--but sometimes it's nice to find a special bird who is very sweet in nature and just needs a good home.
As a final note, I can't say enough nice things about my recently adopted pionus. She is quiet, subdued, and smart--AND her bites are few and far between and don't hurt AT ALL. Most of the documentation I've seen on the pionus species confirms that this is typical pionus behavior. One site called them the "apartment parrot" for being so easy-going (
www.pionusparrot.com). I have a feeling she may not end up being the "cuddly" type, but that's nothing new to me (the amazon isn't cuddly either). She may just be a great pal to sit with me while I'm writing papers or reading assignments.