I made the mistake of thinking the same thing about getting just one. We got just one and we bonded pretty easily. Leela was not handled much or "hand tamed" when we got her as a joey. She is a bit of a diva as well lol but its just her personality shining through.
However, it wasn't long ( maybe a month ) before I started to really worry that she was lonely. It took some more convincing for my boyfriend to understand that she needed a a companion. I spend at least 13 hours a day with her, she sleeps on me all day and a couple hours of play time at night.
The thing is no amount of time I have available to spend with her can replace having another of her own kind to be with her when I am asleep.
In hindsight I wish we had gotten 2 at the same time from the same breeder. We considered it, but He only had one classic grey the other was a mosaic and a bit out of our price range at the time. So needless to say we waited until 1. she absolutely needed a companion ( my first mistake ) 2 we could afford another one.
So our options now are going back to that breeder and getting another joey. Or getting a rescue glider from our local rescue lady. We opted for the rescue Simon who will be coming home with us hopefully next week.
which is awesome and were so excited on one hand, and more worried on the other hand. Leela is a tad possessive of her toys so that is a little concerning. Simon is a 4 year old male who has always had a solitary existence without ever having anything fleece or soft in his cage to sleep in let alone toys. So with Him comes more concern and possible issues. He had some diet issues and some over grooming bald spots from depression when he arrived at the rescue. Sam has gotten him on a good diet and socializing from within his cage with the other gliders. He has even started barking to them
At first he just sat and stared at them all.
At any rate we would have avoided all of this had we gotten two initially. But then in the back of my mind I think if we had... Simon would have had a harder time finding a new forever home when He reached the rescue. I had already been in contact with the rescue lady about finding Leela a companion, within a week she had Simon come in and she immediately thought of me. So perhaps it was for the best in my situation, but again if I had it to do all over again I would have gotten two to begin with and saved myself the worry and Leela from being lonely.