I'd say that in Greece the dominant meats are pork and chicken. That's the main meat in all the grill houses and the meat in gyros and souvlaki. Lamb is beloved but eaten more rarely, particularly in religious feasts, especially Easter Sunday where the tradition is to put a lamb on a spit and eat everything off it down to the bones (except the entrails that are made in a special soup to end Lent, or various sweet meat skewers like kokoretsi, gardoumba, splinandero, etc). It's also more expensive than pork and chicken so it tends to be left for special dinners at home.

But, honestly, nothing beats a nice pilafi with lamb, with garlic wedges and slowly cooked until the meat falls off the bone.