I personally have NEVER reserved an item in a run i have done, i feel people should have an equal right to the loot within reason. I wouldnt invite a person to the group that needed the same item and not let them rolll on it. I wasn’t raised selfish. Not a fan at all of reserved loot. If i wanted to have the loot i am after specifically i would simply make a group that that wouldnt need it but me.
Edit: to be clear this would be a guild group i dont make groups and gatekeep out classes.