If you enjoy the charred flavors, by all means have at it. There's just a lot more opportunity for varietal flavors in the light/medium spectrum when maintaining those growing characteristics. Different origins will definitely give you different characteristics if there's something you don't like...acidic, floral, etc.
Also a light roasted bean doesn't necessarily have to mean a lightly brewed coffee. It's good to play with your ratios for your brewing method. For me, I've landed on 1:18 for what I like most of the time though it fluctuates with how I'm brewing it. For a long time I had a tendency to have a less than desirable ratio and it caused me to stay away from lighter roasted beans.
Also a light roasted bean doesn't necessarily have to mean a lightly brewed coffee. It's good to play with your ratios for your brewing method. For me, I've landed on 1:18 for what I like most of the time though it fluctuates with how I'm brewing it. For a long time I had a tendency to have a less than desirable ratio and it caused me to stay away from lighter roasted beans.