I rarely if ever use the flash, it's just too bright and fake looking. I also own a Canon Rebel camera and rarely use the flash on that either.
It depends on what I am trying to capture. If it is a night scene and it is outdoors and I am not trying to capture any ambiance (like a campfire or candles or a sunset) the flash is great. Indoors/daytime it is rarely needed and if I have it set on auto and the flash goes, I usually retake the photo with the flash off and then choose which photo works best for what I am trying to capture. I prefer to adjust my home lighting to get the effect I want.
At night, especially outdoors, to photograph people and not the background, I will use the flash... otherwise there are other settings to use (such as night or candlelight), so sometimes I will take several test shots with different settings to see which works the best for that moment. Often I find a better setting without the flash.
So, I keep my flash OFF for those quick moments I want to capture during the day with good lighting, and in dark settings I will turn it on but do not expect professional quality photos.