If I'm not enjoying a game, for it being too difficult or tiresome, then I use a guide and usually enjoy it a little more. If a game is good without, all the better.
So in general, good games are better without a guide (at least first playthrough or two, you may want to know secrets you missed later), bad games are better with guide. Except when game is bad by being too easy.
However, I also like to have a guide to know how long a game is, how far in it I am, even if not using the guide for any actual help. Makes easier to plan whether I'm going to finish this chapter today, this game this week...