You only get the feels if you've played the first two games, cuz everyone you know starts dying. I personally saved everyone except Mordin (that song he sang tho) and thane, because if in the first two games you do specific stuff in tali's and legion quest line, you can save both of them, even though legion loses his body and becomes part of the collective memory. I think I have about 60-70 hrs in mass effect, about half as much what I have in both dark souls, and like 1/50 as much in all the halos.