I absolutely adore parrotlets. They can be very cuddly and sweet, but they can be very feisty, aggressive, and nippy. It's hard to know what you'll get with a parrotlet, but I would bet on it being feisty, aggressive, and nippy even if it is very cuddly and sweet. It may not display all of these traits at the same time.
My experience out of the 4 that we have had in our home is that they can really vary with the amount of cuddliness and affection depending on how they were raised and how they are treated once they are a pet.
Two that we got at the same time from the same breeder were handfed, but not handled much so they were wild. One tamed down to being completely tame after a few months and the other was halfway to being really tame. They were both loud from day one, feisty, and aggressive (at certain times) even after taming down. They were a handful, but they could have been even more tame, and they could have settled down a lot more if they didn't pass away in an accident when they were both just over 1 year old. They lived in seperate cages and were both male.
We got another two males when the others died. Both were handraised and handtamed. We got them about 2 months apart, but from the same breeder. One we got was super sweet and tame, but he had his aggressive and feisty moments. We could hold him, cuddle, and pet him all the time. He was amazing. He talked, but he was quiet and didn't scream or chatter. He played a lot. He died of something a little over a month ago when he was a little over 5 months old. It was probably genetic since he had no infections according to tests done on him when he got sick. I miss him so very much, and he was such an intense sweetheart.
The other one that we got is still with us. He's just about 5 months old now. He's extremely tame, cuddly, and sweet. He still does have his feisty and nippy moments, but he's isn't really aggressive at all. You can hold him all day long. I am in love with this parrotlet. He's not loud at all, he talks and doesn't scream or chatter.
I took care of a 3 year old cockatiel female before. She was very sweet, loved attention, and scratches on the head. She didn't nip or bite, but maybe she tried. She would move her mouth in biting motions if she didn't like something. She would touch our hand with her beak this way, but it didn't remotely hurt. It seemed like she wasn't even making contact with our skin even though we could see that she was really "biting". She wasn't cuddly at least not yet since she didn't stay with us more than a couple of months. She was loud, but not so much in volume, but she would make high pitched noises all day long no matter what you did or didn't do. I've been told that females are rarely noisy and often they don't make sounds, but she sure wasn't typical in that department.
My grandmother had two cockatiels that I lived with for two years when I was young. They never made a peep and one was male and the other female. They weren't tame.
