1. Lower cost to you.
Freelance designers require little overhead, insuring you the lowest cost.

2. Quick turn-around is paramount.
Putting your needs into one hand cuts the opportunity of "hand-offs" and deadline delays. One creative mind and a few critical eyes from other neutral individuals results in less time spent going over specifics as well as unimportant tidbits. A design firm may hand-off a project to another designer to give him or her another assignment. The traded project then has to be re-thought (and possibly re-executed) or much time is consumed trying to get the original designers idea meshed into their own. Let's not forget all the time it takes to delegate and explain the project over again each time it's past on.
A freelance designer takes a project from a client, gets the specifics once (maybe twice), starts the creative process with input and/or suggestions from the client, and after a few eyes have seen it, it's a go. No hand-offs, no time consuming relays of ideas, messages, inputs, etc. So, without these interruptions a freelance designer can get your project done quicker.

3. The personal touch is back in business.
I've noticed, with businesses, rarely can you speak to an actual person anymore. Technology has taken away some of our personal connection with our clients and providers. Mobile phones, voice mail, e-mail, websites, automated operators... the list goes on. Freelance designers, of course, use some or all of these things but our main focus is getting your project done to your satisfaction. We don't attend meetings every morning or have to return dozens of e-mails or phone calls before we even begin to actually work. We have a main focus and most of the other things are handled by someone else for us (ie. receptionist, accountant). Now this doesn't mean you won't get an answering machine or receptionist from time-to-time. But it does mean that our concentration is right where it should be. And without many distractions our attention can be applied to you.

4. Time.
Time is important, right? We all have succumbed to instant gradification, it seems, and your business isn't an exception. You need it yesterday.
Well time is an advantage to a freelance designer. Some freelancers only do freelance work. Others work for other people and freelance on the side. Who do you talk to at five-fifteen in the evening? Design firms have closed for the day and you won't be able to get in touch with them until nine o'clock the next morning. You may have a critical change or important question needing an immediate answer, or else realize it's going to take even more time to get the project finished because you had no one to talk to.
Freelance designers tend to have no closed signs to flip in the window. So that means there's a far better chance that your important correction won't have to wait until tomorrow. Freelance designers have time for you when others have called it a day.

5. Quality.
It's pretty much a no-brainer that quality is a freelancers calling card. It has to be. Without the client's satisfaction and word-of-mouth, we would have no business. We don't serve thousands of customers. If we lose a client or a customer is dissatisfied, we don't have the luxury of shrugging it off or not even batting an eyelash. We shrug. An eyelash is batted. Maybe more then one. And quality isn't just about the finished product. Sure, that's the ultimate goal, but factor in time, availablity, communication, care in the craft. It all goes into the quality of our work. There's less room for error when one person handles every nuance of the project. If you talk to the designer, and only the designer, the communication stays solid. Quality is our bread and butter.

6. Passion in what we do.
Yes there's a business end. But the business isn't our main agenda. Designing is our passion and that's why we freelance. When we get a new, exciting project we become overwhelmed with the possibilities, the ideas, the problem solving, the art. We lose sleep over it and it consumes us until we get it all down to a finished product. We set out to become great designers, not businessmen/women. We don't bother with worrying that the boss may reprimand us for spending too much time on one thing. We deligate what needs to be done by what we consider to be most important. We love our profession.