Years ago I thought that I would want a headset mic. I then realized that I cough and burp and sputter way too much. I need to get away from the mic at times, lol.I don't have a problem with the ol' 58 either, but I do also have an Audio-Technica headmic I can use when needed to completely separate my vocal from the drums. But usually, the 58 works out better.
Plus there are times when I sing louder than others (usually really high parts) and I like to back away from the mic some during those moments, even when we have a sound guy.
The 58 has worked so well, no feedback even when using a wedge monitor at a volume high enough for me to hear what I need. (Just started using in-ears, so that's no longer a concern!)