For me I don't like plane that look brand new and like a bit of weathering
You are by no means alone in your preference, so be at ease. Depending on the model and the environment that it occupies, weathering could be viewed as something of a necessity. For instance, consider attempting to model the aircraft below:
In the setting above, I'd be hard-pressed not to acknowledge that a degree of weathering is warranted. I suppose the more appropriate question in this instance would not be "weather or not," but rather, "how to weather, and by how much?"
Let me acknowledge that my life doesn't revolve around building models. I also have to admit that I don't have the skills to pull something off like what's pictured above. However, I know some fellas that really do know their business. On more than one occasion, I've seen them start out in pursuit of a difficult rendering like that, only to quietly can the whole project when they weren't satisfied with the outcome. Months or even years later, they sometimes resurrect the corpse and attempt to save it. I'm mentioning this because I believe that it's important to entertain the notion that it's not one bit easier for a manufacturer to weather a model than it is for an individual. This is particularly true when we consider the fact that many models from TS-models have production runs in units of several hundred, or more.
To my way of thinking, there are some fairly serious requirements for a manufacturer which wants to do justice to an aircraft model, with weathering or without:
1) The "builder" has to bring it's manufacturing processes into alignment with the rendering challenges involved in a particular build.
2) The "builder" has to properly research the model in question. This may sound obvious, but I'm sometimes shocked at how poorly researched a model appears to be.
3) The "builder" has to insure that adequate resources are devoted to production of the model. If costs rise along with the fidelity of the model, so be it.
A lack in commitment in any of those three areas is almost certain to lead to disappointment, at least in my case. We know that it's doable, because of the Jenkins example. The price-point may have to rise above Jenkins floor of $200, but I, for one, can live with that.
-Moe