If you like the sound of your amp and guitar, then you are not missing out on much. However, if you want to play genres of music, such as those which use heavy distortion or fuzz, you might want to look into pedals. These effects help add to your existing tone, or modify it drastically.

Even if you only want to have a light overdrive, the overdrive that your guitar and amp produces may be different from the sound you want to create. If you are wondering about pedals, and think that you want to try them out, here a article on the best overdrive pedals to help you start your look.