A nice flat panel door for interior use can be a really good choice if you don't want any frills or fancy designs. This type of door is simple, clean and works in most settings, so no matter whether you prefer a rather modern style or if you prefer something much more traditional, you should be safe to go this route.
Picking interior doors can be tricky, there are actually quite a bit to choose from. Of course price come into consideration here too: some of the better made doors in solid wood are of course much more expensive (if you prefer a door like that, sometimes you're better off looking for something used at a place like Habitat for Humanity), however you can often wooden panel doors with hollow cores which are more reasonably priced.
A flat panel door is just like the name suggests flat. Some are completely flat and offer no design whatsoever, whereas others have some panels carved out on them. These types of doors are available in wood - or woood panels, as well as in other materials. If you're planning on painting the door, then it might not be necessary to get a wooden door, however if you like the warmth and complexity that wood brings to a room, then you probably want to go that route. So where do you find these doors? Well, if you have a dedicated windows and doors store nearby, then they will probably have the biggest selection (unfortunately they might also have relatively high prices.) If price is a concern, then checking out a larger store such as Lowes or Home Depot can be a good idea, and often you can find pieces for very reasonable prices there.
Legacy Doors 36 In. 2 Panel Arch Unfinished Knotty Alder Interior Door Left Hand Swing
"Experience the beauty and warmth of wood with this home interior door unit from our Legacy Doors Premium Wood Door Collection. Made from select hardwoods and ready to finish, this door will give your home added beauty and value for years to come."
Masonite 30 In. x 80 In. x 1-3/8 In. 6 Panel Textured Hollow Core Slab Door
"Molded panel series. There's no better variety available than our fine line of molded panel doors from Masonite. And they're an environmentally sound choice too! Molded panel doors from Masonite are more durable and resist warping, shrinking and cracking better than solid wood doors. These beautifully engineered doors are available in a smooth or textured finish with matching bifolds to suite any decor"
These doors can be found at homedepot.com