Lately, I have seen many games that throw in various kinds of side activities (collectibles, side missions, quests, or whatever) besides the main storylines or objectives. I won't argue that a lot of games have pointless side quests (personally, I think collectibles are a waste of time in games like Alan Wake, or Max Payne 3, and don't ever remind me of flags in AC 1). Yet, I like some games having these kinds of things, since they expand game time considerably and are enjoyable (the first one that comes to mind is Red Dead Redemption with the challenges that unlock costumes or activities that earn you money to buy weaponry and such), so, sometimes, it makes me believe that I get the most out of my money.
What about you guys? Do you think completing a game (if not 100%, at least do as much as possible) is a way to get the most out of your money, or you just speedrun through games without caring about side activities?