Does the inclusion of RGP elements (i.e. 'experience' points for upgrades and character attributes) into "action" games add to or detract from the playability of these games? For example, The Godfather, a GTA clone, uses respect points to allow the player to build up certain features of the playable character as well as earned money to buy weapons upgrades and the like, while the original GTAs just use straight-up violence to propel the gameplay without the tedium of "minding the store", so to speak, and arguments abound about which of these games is the stronger. Enlighten me, please.