If you are the only owner and employee of your business, and you feel you aren't likely to be sued, then from a taxes/$$ standpoint, your CPA is probably right. However, if you can think of reasons that you may be sued, your personal assets are protected in an LLC (unless you do something illegal or fraudulent). Also, as a corporation, should your business "take off," or if you get tired of doing it one day, it can be sold easier. Its assets and your personal property can be easily separated.
As far as taxes and complications? If you run a successful business, then I'm sure you can do the taxes for it. Might even be easier as an LLC. You still file your income from the LLC on your personal taxes, and the LLC reports it's financials as an "informational return" just to make sure the members (owners) of the LLC report the same numbers on their returns. If you are the sole member of the LLC, then that's easy.
My taxes are complicated, but my wife and I own several LLCs and file in several states. My wife does our taxes and I handle all the other financial duties. That's our agreement, and we both like it. If she didn't do them, I'd use an accountant. She uses Turbo tax for businesses, and gets the audit insurance.
There are other advantages/disadvantages to LLC vs sole proprietor, but if you want my advice - don't take advice from posters of online forums that deal with trucks. :bwahaha: