Age
Jacob: If I ever end up marryin' a woman, she's gonna have to be someone I love. I mean, looks are nice and all for the first twenty years, but when you start getting older and the tattoo of a dolphin on your back that you got as a teenager starts lookin' more like a beluga whale, you want someone around who'll keep an old hack like you company. Er, not you specifically, Commander.
Zaeed: I'm already too fuckin' old for this. I'll be kickin' the bucket sooner than it'll take for the Reapers to get 'ere from dark space. Bloody machines. I want to go out in a blaze of glory, not waiting in a goddamned hospital bed for my daily suppository.
Kasumi: No matter how young you are, or how old you'll become, you're you. No one but you can change who you are. You'll always be the same on the inside, no matter what. That being said, I wish I could physically be the same thirty years down the road. I don't exactly have many job opportunities other than this, and let's be honest: I don't think a fifty-eight year old granny thief is going to strike terror into anyone's hearts.
Miranda: Given my enhancements, I'll most likely surpass the age of most other humans by a good forty or fifty years. I'll continue to look as I am until I'm seventy. Though it's nice to maintain youth and live longer, I can see how some species may see living for such a long period of time to be an agonizing existence.
Garrus: Jeez Shepard, you want me to picture myself in twenty years? Have a heart. I'm already ugly enough as it is. I don't need to think about all the wrinkles and liver spots I'll have the pleasure of getting as a geezer.
Thane: It matters more what one has done with the years given to him than the number of years that he has been blessed to receive. There is still time for me to atone for what I have done, and so long as I am still breathing, I will.
Grunt: I may be a mere child amongst my people, Shepard, but that doesn't change the fact that you'll never find another eight month old krogan as strong as me.
Legion: We have no need for age. Synthetic organisms such as geth can replace parts and figures to replenish themselves. Essentially this platform can live forever so long as we can fix ourselves, and can optimize ourselves given the correct materials. Statement: we are led to believe that any N7 armor could highly boost our skills in combat. Simply a suggestion.
Mordin: Salarians live short lifespan. High metabolism, very high. Constantly working, constantly thinking. Most make most of what little time there is. Some salarians become mercenaries, get thrills through killing. Others become 'ringleaders', though considering poor salarian male sex drive, not very exciting. I chose science. Far more interesting. Far more fascinating. Learn many more ways to kill a person with acids and compounds than with simple guns and bullets. Could show you! Would need test subject. On an unrelated note, Joker available?
Jack: Want to know a fun trick? Fuck someone up when she's a kid. It's pathetic because she can't even fight back. The moment she defends herself, you shove her right down. It's not so easy when they get older though. That's when they start to get really feisty.
Samara: Nearly a thousand years alive and I have seen things across the stars that would pale the coldest of criminals. With my years has come wisdom through failure and knowledge through loss. What I have learned from my time alive has been everything necessary to keep me alive. Though I will surpass the age of many other races, I am damned by the fact that I will have to watch every friend of mine die before one tenth of my span has even been reached. It hurts more than any bullet I've ever received. So, so much more.
Tali: When quarians grow old, the younger quarians of the flotilla take care of the elders. It is simply a show of filial piety and respect. We do this for everyone in our flotilla, including nonfamily members or strangers. We are like one big happy family, the Migrant Fleet. One big, happy family drifting aimlessly from star to star without a true home…