Dak bulgogi (DAHK BOOLgohgi), dak meaning chicken and bulgogi meaning bbq or grilled meat, is usually spicy-hot whereas the beef kind isn't. But the base of the marinade is fairly similar.

I like to use thigh meat because the texture, flavor and fat content holds up better to the marinade than breast meat. This recipe is specifically for kabobs, but you could certainly use whole pieces of boneless thigh meat or even the entire thigh if you like, and cooking times will of course increase accordingly.

Generally speaking, I'm not a big fan of overnight marinating. There are very few proteins that won't get a cured texture under the saltiness of most marinades if left to sit in them too long, though fattier cuts do hold up better. The marinating point of diminishing returns is even earlier on meat that's cut kebab-size (1" to 1.5" cubes). Ideally, I would let this marinate for an hour or two at most. It won't be awful if you go longer, but the meat will begin to feel, well, hammy.