>>36412956>personalityThe appeal of basic designs is that they provide an opportunity of roleplaying and free artistic creativity. A basic looking design can be attractively dressed up in many different ways and still retain its original style. This can give it all kinds of different types of personalities since the pokemon is essentially a blank slate for you to mold however you like.
And yet, look at how overdesigned Decidueye is. I hate the "flesh clothes" argument but where does the hoodie end and the feathers/skin begin? Decidueye is designed in such a way that you really can't dress it up without making it into an even bigger eyesore. It is locked into a single personality by design and if you don't like that one then tough luck.