I hate having missable crap in games. Imo there should be no missable items. If you miss something there should be some way to get it at the end of the game. That would massively reduce the need for guides as you playthrough the game.

I love going through guides of games I have played in the past to look for stuff I missed or new strategy ideas. Hell, I've even gone through the entire formula guides for some games I really liked.