What you think of in terms of tradition will likely vary from the person sitting next to you, the person sitting next to them, and so on. We each see something different in terms of tradition. Whether your traditions are based on holidays, ethnicity, religion, region, country, or all of the above, you probably ahve some visual perspective on that tradition. Things from the past and from our childhood tend to dictate what we feel is tradition for us. This all means that when you find a designer to do your home, and you tell them you want a traditional style decor, you might have to explain yourself a little further. There are traditional styles for every background and ethnicity. Think about it this way, if you grew up in the middle of Kansas with golden prairies and country scenery, you would have a different view on a traditional decor that a girl from India who grew up on Bollywood movies and jeweled silk decor.
When it is time to decorate your home, you have two choicese when it comes to traditional styles. You can go formal or casual. Formal or elegant styles are usually what people mean when they talk about a traditional design. The styles then separate into Italian, French, English, Baroque, Queen Anne, Chippendale, Rococo, Neoclassic, Empire, Victorian, and occasionally Spanish styles will be your most popular.
If you are going for a casual traditional design your fabrics will become more earthy, and you might be looking for a more country design. These designs tend to go better for people that have children, live in rural areas, or just want to leave the city behind. These looks will range from English and French cottage styles, American southern and western styles, casual Spanish, some African designs, and rural Oriental styles.
You are most likely looking to combine periods in your home. This is, unless you are building your home from scratch and can dictate architecture, building materials, and scale down to an exact form. While single period decor is nearly perfect in execution, most people just do not have the patience, nor the budget to attempt such a thing. Perfect period design can also involve stowing a home theater so it is nearly invisible.
For formal styles, Queen Anne will pair well with Chippendale, and both these styles have both high end and knock off furniture styles so budget is rarely an issue. Neoclassic and Empire come together well, but the styles are hard to stick to unless you have a good sense of period. Most casual designs are declinations of Victorian, Greek, Roman, or English Renaissance designs. These designs involve lighter colors, more country appearances, and simplicity in design. They are easy to combine, easy to pull off, and inexpensive if you are careful with your design budget.