Your point is taken however, you need to look at the bigger picture rather than just what you like. While you may not like the change, others do... everyone have different tastes in babes/designs etc. What about the many people who do like wallpapers that are not just plain ones (i.e. crop and resize)? These people may not like those plain ones as they can do it themselves etc. so by doing non plain wallpapers as well, it may attract these people or re-attract them as the case may be.
The mix of design in wallpapers is a good thing. Your style of wallpapers will always be there, but respect other people who think different to you. Besides, the majority of wallpapers are your style anyway and will always be that way.
And if all the wallpaper designers just stuck to the design style and babes they liked then this site wouldn't be where it is today.