Measure, noting friction points that may need lube to avoid squeaky-squealy sounds that might be off-putting to some occupants.
Choose from in-swingers, out-swingers, or dual-swingers. Get only the swingers you want.
Consider what might be available in other rooms nearby, and choose those that reflect your personal taste.
Choose to do it yourself, or ask a professional for help.
To ensure maximum satisfaction, make sure all your interior and exterior doors are well hung.