It's because they feel as if being apart of a faction off the bat is comparable to Fallout 3 (which I thought was great, but regardless), in that it takes away from the backstory that players want to create. The main argument thus far is that being a BoS member off the bat is restricting, unlike being the Courier which could have happened for any number of reasons. My counter argument is that being a BoS member doesn't hinder the backstories very much in comparison to the Courier, if at all, since your character could have essentially joined the BoS for ANY number of reasons. Perhaps you're a Legion/ Enclave spy, or a drunkard who found sanctuary in the BoS, or perhaps your grew up in a BoS bunker, or any number of other reasons why you might be a BoS member. The ONLY difference between the Courier and the character story I developed is the sheer fact that you start off as part of the faction, even though it's not said why or how (just like the Courier), and could offer a storyline that could potentially be amazing (which is the most important thing. More important than backstory in fact).
Thanks for the compliment too btw.
The Mojave Express isn't a faction like the BoS at all, they're a service, not a group looking to take control or gain more ground. Being The Courier can't be compared to having sold your allegiance to the BoS or another faction from the start. Again, what if I don't want my character to have sold his/her allegiance to the BoS or any other faction right at the start, but instead want a completely blank slate to start from, like The Courier. With The Courier, I could RP anything I wanted. If I wanted to be a Tribal who refused energy weapons or heavy armors (which I have in New Vegas), I could be. I can't be a Tribal who refuses to use energy weapons or heavy heavy armors, if I'm starting out as apart of the BoS. If I wanted to be just a wastelander, roaming around the wasteland, I couldn't because I'd have sold my allegiance to the BoS for whatever reason, when in my own mind, I didn't want that to begin with, I just wanted to RP a basic wastelander with no allegiance to anyone but himself. The Courier form of creation/history, gives me this opportunity.
Basically, no matter what, for whatever reason it may be, the PC
has to have come from the BoS at the start. I have to have joined them for whatever reason, and then got caught up in this or that. Not like The Courier, as I said, where the PC could simply be someone doing the job for the first and only time, having done it for years, done it for the caps, done it because they were a Frumentarii spy, done it for a wide range of reasons that didn't involve them origination from any faction whatsoever. Their allegiances and help to factions, were through the players own choosing. You can RP being apart of the BoS in the Mojave all you like, there's nothing stopping you from it. But being from the BoS or any faction right off the start as being apart of your "vague" history, does stop you from being able to do open certain RPing doors.
Still creates the posibility to be a spy for said faction, wanting to kill a member of the BoS, and the only way to get close enough to do so is to join, or you want to join the ranks to see to the demise of the BoS. Those are all but a few possibilities. Or perhaps maybe they FORCED you to join. Another possibility.
If it's the West Coast BoS, they don't recruit anyone into their ranks from the outside. They're isolationists, they get their numbers from the offspring their members have, which is why they're not a huge faction like the NCR or Caesar's Legion.