For years I used the 1mm EVH picks with the grip on them mainly cause I could hold onto them and they were comfortable. I noticed my tone was always kinda dull sounding to where I almost sold my AxeFx. I watched a video with Phil Collen talking up metal picks so I thought I'd give it a try and bought some brass Dunlop Tetrapicks. I can't believe what a difference it made for me personally. Using those picks opened up my tone so much and the unit sounds so much better. It makes it sound more present and punchy. I have come to the conclusion that your picking hand is just as, if not more, important as your fretting hand.