Despite the vivid colours you have used, your models still look very good. However, from a fluff point of perspective I must protest to your habit of painting your Tyranids' weapon symbiotes a different colour to the arm that they are attached to. This is simply because in Tyranid fluff the weapon is supposed to be almost indistinguishable from the arm that it is attached to and yours are clearly not. Otherwise, good work, have some reputation.