Your action may have to be raised if its close, you may need super glue for the holes in your fingers, if you have a tremlo your spring tention will need adjusting. You may also be mistaken for a bass player. Those thick strings get old fast as far as comfort goes. You may be having to readjust settings when you go back to lite. I myself get a dam good metal sound out of lite strings, actually I perfer extra lites, much tighter action I think, and they rock. It really comes down to your equiptment, amp, effects, pickups. That where the heavy sound is. I also think a heavy pick is limiting in the things you pull off with playing styles. I would find a happy medium between heavy picks, and thin to give your playing more range of techniques. Rock on dude metal rules