Cast iron is definitely the way to go. I was taught only to touch the meat once while it's on the grill, when you flip it. I've modified that to 2 because I love the crosshatch look. Put the meat on and let it go, then a 1/4 turn to get a nice crosshatch and then once more to flip it. I know you can get better flavor from a nice even char, but those fancy steakhouses usually have an 1800* broiler which I don't have. I do have a cast iron pan, but there's just something sexy about nice grill marks.
"I can get a good look at a T-bone by sticking my head up a bull's a$$, but I'd rather take a butcher's word for it". - Tommy Callahan III
XL Big Green Egg, 22.5 Weber OTS, WSJ Gold/Mini WSM, 18" & 22" WSM
Flyers Orange Thermapen