A bit of a cop out answer from me, but I'll at least tell you why I don't think it matters much, and should just fit the game's overall feel.
Grid if you've got a lot of stuff that someone took the time to make pictures of, or you can easily see it rotate or something nicely in your inventory. Which probably takes a lot of time and effort to do all that. Which is appreciated most times. Just being able to inspect the things you pick up, so you can look at the details. That's always fun.
However, inventory lists are fine if you can quick swap between food, healing, armor, weapons, etc on the fly to make finding things easier.
It really depends on how much time and effort was put into making things look cool in the game, and how much detail it has. If it's a pixel game or a low poly game, a list inventory is fine. Maybe add little icons of what the items type is. Such as a sword/gun icon for weapons, suit of armor for armor, apple for food, etc. If items fall neatly into the above list of basic things you're bound to come across.
But if it's a 3D game, and a lot of time and care was put into things looking really nice, it might be fun to see it in closer detail in your inventory.
A bit of a cop out answer from me, but I'll at least tell you why I don't think it matters much, and should just fit the game's overall feel.
Grid if you've got a lot of stuff that someone took the time to make pictures of, or you can easily see it rotate or something nicely in your inventory. Which probably takes a lot of time and effort to do all that. Which is appreciated most times. Just being able to inspect the things you pick up, so you can look at the details. That's always fun.
However, inventory lists are fine if you can quick swap between food, healing, armor, weapons, etc on the fly to make finding things easier.
It really depends on how much time and effort was put into making things look cool in the game, and how much detail it has. If it's a pixel game or a low poly game, a list inventory is fine. Maybe add little icons of what the items type is. Such as a sword/gun icon for weapons, suit of armor for armor, apple for food, etc. If items fall neatly into the above list of basic things you're bound to come across.
But if it's a 3D game, and a lot of time and care was put into things looking really nice, it might be fun to see it in closer detail in your inventory.