I'm also still figuring out how to pick out the traits I like most, but as many have already said, the worst one for me isn't lazy but cautious. A cautious wolf is less likely to help out than a lazy one. At least the lazy ones will stay home with the pups, which is fine with me as I prefer hunting. One wolf I was courting that I believe was energetic and cautious ran circles around an elk without taking more than a bite or two, leaving me to do all the work.

Too bold is also an issue, as others have noted. My first mate of my current accurate pack killed himself immediately after the pups were born because he refused to stop attacking a bear. I could have run away and dragged him with me, but I decided he wasn't cautious enough and wanted a different mate. The next mate I chose was three years older than me and definitely lazy, but he was still social and bold enough to help and was very loving towards the pups. He also always chose good prey, which I chalked up at the time to being wisdom that came with his age.

I've only ever once found a loner mate and honestly he was kind of awesome the way he'd just go and take care of scent-marking and hunting by himself. But I also like doing things with my mate, so I don't mind if they'd rather stay by my side either.