There are 9 species of  lovebirds, but I specialize mostly in  Peachfaced Lovebirds.  I believe they usually make the best pets.

Lovebirds are playful, happy birds. They have a lot of personality and are usually fairly cuddly.  They are also relatively inexpensive.  A single Lovebird can make a terrific, devoted pet, but a pair of Lovebirds will often bond to each other and not care to spend much time with you.

Lovebirds will learn human speech. However, if you're strictly interested in a talking bird, you may not want to purchase a Lovebird.  I have had several that learned to speak through no effort on my part, but the majority don't talk.  

To keep your baby tame, you need to be prepared to devote a portion of each day to playtime.  Lovebirds who aren't handled daily, at least during the first 6 months or so, don't usually stay sweet and cuddly.  However, since their idea of playtime is to ride around on you, it's not to difficult to work playtime in.

Lovebirds, like my other birds, require more than just seed and water for a healthy diet. In addition, I feed a pelleted diet, fresh fruits, vegetables, wheat bread, "bird bread," cereals, pasta, and a bean mix to keep my birds heathly and active. They can eat basicly everything a person with a  healthy diet would eat.  (Not chips, junk food, sugar, etc.)