Double deck games are generally superior here in Vegas. But there is a price to pay for that. They are watched more closely. For that reason I play mostly 6 deck with some double deck mixed in.
Until recently, I played almost exclusively shoe games. Many times 8 deck, with very mediocre conditions, so give me a 6 deck game with good rules, like surrender and decent penetration and I am in heaven. It kind of seems shoe games, although not the best games is my specialty or my little niche. Also having played so many 6/8 deck games, double deck games seems like more shuffling than playing to me. Gets frustrating.