The Wikipedia article LazerLuger quoted about says it all. Many computer RPG's would be more accurately described as interactive movies. The telltale sign of those is that the non-story bits consist of inane filler which people tolerate only to see more of the story. (How many people do you think would play FF if you took out the story and switched the characters with generic ones?) The games where the in-between bits are worth playing for their own sake would be accurately described as light tactics and/or action games with a heavy story component.
Ultimately, a game is an actual RPG when it empowers the player to engage in role-play. That's a very fuzzy definition, but one such element would be having choice with long-term consequences that affect the story and that have no optimal outcome.
Ultimately, a game is an actual RPG when it empowers the player to engage in role-play. That's a very fuzzy definition, but one such element would be having choice with long-term consequences that affect the story and that have no optimal outcome.