That's cute rhetoric, but it doesn't offer any principled way to distinguish between a hat DP choice and, er, cr*p. Do you have one, or is this one of those subjective feeling deals?
How do the devs offer hard choices without making you feel bad?
Straycat, this is what I'm talking about with people making the same statements over and over, forcing me to repeat myself over and over...
At any rate: short answer, it isn't easy. Longer answer below.
1) The most obvious one: by offering a wide variety of fates for the protagonists. Endings where Shepard dies. Endings where Shepard lives. Endings where Shepard lives but is crippled. And so on. Sacrifice should be voluntary on the part of the player. ANd the player should not be punished for declaining to ride that particular rail. Shep should be allowed to walk away without a big "Game Over" screen.
2) Make the sacrifice seem worth it. Simple survival is not enough of a "reward" if the cost is genocide, slavery and eugenics. I cannot stress this enough. So I underlined, italicized and bolded it. This gets overlooked SO MANY TIMES. I wonder if I should add it to my sign under Dalinar Kholin's quote.
3) Make it fit the story. Shepard can go from strength to strength, suffering only one major defeat (Thessia) and then, surprise! Here's the Catalyst going "You shall not pass!" Frankly the entire game feels on-rails And Shepard only gets off Earth at the start because of artificial stupidity. Shepard exists because they allowed it and ended because they demanded it. The entire ending scenario feels like the story is being wrenched away from the player. Well, much of the game was like this but the ending especially so. It's taking Shepard away from us and turning him/her into a sock puppet.
I'd cite DAO as a great example of sacrifice on the part of the player. But I know from previous iterations of this conversation that you consider the DR to be the "I Win" button. And then I respond with how I don't find it the best ending, and I prefer "Redeemer" You disagree because with the Dark Ritual everyone lives. And around and around we go...
I'm not telling you that this time. I kind of wish you knew the episode now. It's interesting... it's about how the Doctor moves from simple hologram to truly going past his programming and becoming a full fledged character.
But whatever..
I'm not blaming you for anything. Just explaining. There are a number of people (a few I have on ignore) who think anyone who doesn't kiss Bioware's...ring is some kind of troll. And won't let minor details like "facts" get in the way 
And while I have not seen Voyager in a good ling time, I am familiar with the episode 