Depends on if they're native to my game, I really like pokemon with names (as long as it isn't completely idiotic like a haunter named Freegengar, seriously got that on wondertrade). A pokemon without a nickname is just missing out on a big personal touch that makes it unique. I have a dog themed team of pokemon and every one has a name except a shiny entei and it bugs me so much to the point that I consider it my least favorite on that team. I might be alone here with my weird pokemon nickname OCD but I have a shiny hawlucha and a shiny aegislash I hatched myself called 'Cloak and Dagger' (both are 5iv adamant) and I wouldn't love them without the nicknames, I'd still like them to a certain degree but without names they'd be no different from every other pokemon like them.