Pretty much this. In my head Shepard lives in the end and finally get his well earned sit down with his LI and live happily ever after blah blah. Even though the end wasn't definitive I felt like it was better that way because I ended up thinking about how it would have ended in my head and therefore just kept thinking the game for a while even after I had beaten it. It's a weird feeling, but I probably wouldn't have put nearly as much thought about the ending if it wasn't so open for interpretation.