The main problem i have with previews is that they sometimes have spoilers in them...even if they are small ones it still kinda annoys me. Like recently I thought it would be a good idea to read an oblivion preview and it went on to telling you the events that happen at the start of the game, I know its only the start but it would have been so much better beggining the game and not knowing that was gonna happen...but now im gonna be expecting it