Oh certainly, some situations are going to require excessively more head canon than others to achieve suspension of disbelief, but I'm not sure the simple fact there was a voiced protagonist with a background is sufficient charge to condemn the game for its role-playing possibilities. You mention Fallout 3, which I (oddly enough) found to have one of the most evocative/conducive to role-playing openings I'd ever experienced in a game. Odds are it happened to align well with what I was going to do anyway, but at the end of the day the only real limitation is one's imagination.Johnisback said:It's not just the presence of a back story though, it's how it's written. The more specific and illustrative the back story gets, the less options for believeable role playing you have.
This was one of the main issues I had with Fallout 3, the player character is shown to have a loving father, at least one close friend and a place in a caring community. The only difficulties the PC faces is a gang of bullies who are about as effective as Team Rocket seeing as the player can easily beat the crap out of them 4 on 1.
With this back story attached to my character I find it very difficult to roleplay an evil PC without simply resorting to making a mustache twirling villain.
Now on the other end of the scale you have New Vegas, where the backstory is practically non-existant. It amounts to "you're a courier, you've been shot in the face." This allows more freedom for role playing but requires the writers to add in the old, lazy amnesia plot device, or risk retconning a player created back story further down the line (like Lonesome Road can easily do).
I personally think there's a happy middle ground. Dictate the PC's back story to the character, but give the player significant influence on how it turns out. Dragon Age: Origins would be a great example of this, it goes above and beyond the call of duty by providing you a number of back stories to choose from. But even then, each back story in isolation gives you plenty of opportunities to establish whatever ground work you wish to role play on top of.
Games like Planescape Torment or Baldur's Gate or any of the Witchers have extremely detailed character bios and backgrounds. I find it difficult to charge those games with being bad RPGs, or "not real RPGs", because I didn't have complete freedom to imagineer my character.
In my case, the issues I've found in Fallout 4 have been a casualty of bad writing and pacing, not the fact there was a backstory. I'm a suburban wife who was a lawyer and now there's been a nuclear holocaust and my husband is dead and baby missing? OK NP. I'm out of the vault for twelve minutes, people are shooting at me, I'm stomping around in power armor, a stranger is asking me to lead a revolution and I'm cracking wise about being 240 years old. Ooooooo...okay. I'm doing my best, game, work with me a bit here.