I don't mind them doing something a bit wild with the third kit. If you collect the shirts they can be a bit of fun to have mixed in there. I'm pretty happy with the following:
Home kit - Sky blue with white shorts and nothing weird going on with the sleeves.
Away kit - Something based around one of our traditional away designs e.g red & black stripes, maroon, white & navy, wembley 99 (not my choice but people seem to like it)
Third kit - Go crazy. Some will like it, some will hate it but it mixes things up a bit and the younger fans enjoy it. Also gives the kit manufacturer to do something a bit on trend (which I guess is fine given how much money they pay).