Every voice is different, and a microphone that will sound good on one voice may not sound good on another voice. I sing through an AKG D-112 mic commonly used for recording kick drum and other low frequency sources because it's more forgiving of my bad habit of singing too close to the microphone, ie. right on top of it. I also sing very loud but in a relatively narrow frequency range without much lows or highs, mostly mids. As Eldermike said, this type of mic is designed to handle proximity effect better and also handle high sound pressure levels. The D-112 also has a slight bump in response at around 4khz which helps to liven up a weak area in my range.
About a year ago, I spent a few hours in our rehearsal space singing through about 15 different microphones into the PA at performance level just to see how they compared to each other and to find the one I liked the best. I thought the D-112 was best suited to my particular voice so I've used it ever since.
See if you can borrow a bass mic from someone and use it at your next gig for just a few songs and compare it to a regular vocal mic that you're used to.