@Tuco
I actually like having both....I like finding secrets and delving into a game to acquire hand placed loot...but unless a game goes out of it's way to make it exceedingly hard to grab all the loot and grab high level loot early and make it so that you can only grab some of the items per playthrough (ie like dark souls boss soul weapons) while also making it so one can't just save and reload to see which piece they prefer (ie save scum between three choices and try them all before finalizing a pick).....it brings less replay value to the game. Fact of the matter is: for gamers like myself that will go through every nook and cranny at a snail pace and even double back through entire areas when given a trial that splits just to cover the whole map (ie I 100% every level in DOOM on first try -> even spent three hours in one level to find all secrets) having a randomized system gives replay value by allowing us to be surprised and creating a new experience with each game.
I like not always knowing what's behind the door in a game. Heck, the random weapon box and wall weapons, semi-random zombies and known mob, ect... are a large part of what makes Black Ops Zombies so replayable on end...it combines a mixture of random and directed known elements to create a unique experience every game while still making decision making powerful.