I was just pre-ordering my copy of the Pip-Boy Edition for Fallout 4 (Because I mean, after that presentation, who wouldn't?). Anyway, whilst I was waiting for the GAME website to sort itself out I was reading through the description.
I was really happy to read this. The ability to join different factions and the option to go it alone such as in Fallout: New Vegas was brilliant and allowed for much more roleplaying ideas compared to Fallout 3 in my honest opinion (which still had this to a certain extent, but not nearly as much I do not think)
If anyone's already pointed this out, sorry! Just thought it was interesting and thought I'd share.