Well... I've been playing both the Half-Life and Metro series and I can definitely see how both can contrast each other with how they tell their stories... or at least try to.
With Half-Life... well, you've already covered it, but with Metro (specifically 2033 Redux), most cutscenes won't allow you to turn your head, even though every single one of them are in first person perspective. Sure, sometimes they allow you to just wander around while a companion NPC spews exposition at you and the game actually rewards you to do so, either by giving you extra resources (ammo, air filters, health packs, weapons, etc.) or by giving you a "moral point" that can actually trigger a different ending.
Most of the time though, the game will let you choose to either listen to the character ("Stop!, hide!") or just ignore him, but the game acts accordingly, sometimes you can avoid an entire firefight that way, or you start shooting to your hearts content, but you'll waste precious ammo and health packs in said fight, you'll have to be extra careful in areas where you have to use your gas mask, because it can actually break in a serious firefight.
So yeah, Metro is both better and worse than Half-Life 2 with it's use of cutscenes, sometimes it entirely takes away control from you (though it stays in first person perspective at all times), but sometimes it'll let you wander around while an NPC is talking, sometimes to your benefit.