Is it common to feel a change in personality after going under full anesthesia?

Most of the effects of anesthesia have worn off by 1 week.  However, surgery is a stress, and stress--good or bad--can alter moods. Also, sometimes pain medication will give some people a "high" feeling, especially with a drug like Percocet. You may be much happier now that the surgery is past, and now have energy to do more things. If you continue to feel this way, please discuss this with your family physician.

It would be unlikely that the anesthetic yes had for your surgery had an envigorating affect on your personality. Are you taking other medications? Surgery itself can have a profound impact on people. Some go through highs and some go through lows, and energy levels vary from person to person. It's difficult to say why you're experiencing this odd burst of energy. You could discuss it with your plastic surgeon and your primary care doctor. 

I have heard patients report this phenomenon before. It is most likely related to the fact that you are relieved that the stress of surgery has passed.  You will find an example on the attached link, with a young lady in the ocean with her arms up. My best suggestion: take it easy, and don't overdo your activity. Otherwise, you are correct and will potentially experience a “crash”  possibly associated with a post operative “depression”. Pay attention to eating correctly,  good hydration, and getting sufficient sleep. Best wishes.

Your burst of energy is most like a result of relief the surgery is over, and you are recovering well. Take care care of yourself, and enjoy your life!  Best wishes!