We have two male Lovebirds, eight year old Poca and 4 year old Coco. We adopted Poca at the age of 3.5 years old from a lady who was looking to rehome him. Poca was a proven male, and although he was not tame when we got him, I was able to win him over during a three day long weekend of one-to-one time with me. Poca came with his 14X16 size cage that had a sleep tent hanging in the far left hand corner of his cage, with two small dishes for food and water, two perches and a few hanging toys. I kept this cage for him as this is what he was used to and seemed happy in.
We purchased Coco four months later at the age of 12 weeks from a pet shop, and although pet shops are NOT my first (or second) choice to purchase pets, it was Coco who chose me as he abandoned the toy he was perched on in his small cage and ran to me, clinging to the side of his cage. When the shop-keeper placed him in my hands, I knew I could not leave him behind. I should have known that Coco was also a male, seeing as Poca took an instant dislike to him, and Coco grew up disliking Poca as well.
I believe that Poca being a male was a contributing factor to my being able to tame him that easily. I have known people with both male and female Lovebirds who all vouch for the males being the ones to bond more easily to humans, and also tend to be more playful and acrobatic, climbing into sleeves and shirt collars in a playful manner. I have also heard similar behaviours with the females, if they are not hormonal and needing to protect their nest.
I always knew that I wanted two of the same species, in separate cages side by side. I believe that having two Lovebirds side by side both provides them with company for each other while at the same time, fosters the avian/human bond. I purchased Coco the same size cage as Poca, and he took to it instantly. I believe that if Lovebirds are given three to four hours per day of free flight time along with human bonding, that this size cage, 16X14 is sufficient if this is what they're used to. I would definitely not go any smaller, and I would make sure that toys are rotated every week to provide variety. Lovebirds seem to love their sleep tents.
Our Avian vet in Bowmanville, Ontario, recommended that their diets be comprised of 80% avian pellets and 20% cockatiel seed with fruits and vegetables being offered daily, which my Lovies refuse to consider. So I place the pellets in their food dish first thing in the morning and then add 20% of what they've eaten in pellets, with seed in the evening, which amounts to very little seed, if they have not eaten much pellets. Although I understand that the recommended pellet/seed ratio is now 50/50 for smaller parrots.
If I were to get another Lovebird, I would definitely get it as soon as it was weaned, usually no earlier than 8 weeks. I would personally still choose a male and would want to know the gender before choosing my baby. Females also have the added concern of possibly being excessive egg-layers, which may result in egg-binding which is very heartbreaking if this occurs. Females are known to be prone to more mood swings in adult years, after they reach sexual maturity, being cage-aggressive during hormonal season, while males tend to be more "affectionate" as they regurgitate on their "human mate". Although this behaviour is not to be encouraged in males, at least they are not physically aggressive, in my experience.
If you get a male Lovebird between 8 to 10 weeks old, I believe that you increase your chances of having a tame well-rounded pet, provided that you socialize and interact with him daily. Nipping/biting can be redirected early on so as to discourage this behaviour as the bird gets older. They learn quickly and the stronger bond you form with them, the stronger the attachment and the less nipping occurs