Mass Effect Narrative Guide
It's been asked for, so if you're interested, here is my spoiler free guide for what I would consider the best and most coherent narrative experience in the Mass Effect Trilogy. My personal experience is in the Legendary Edition, so please bear that in mind.
I've separated it into the different games, because each game builds on the next and I shall likely refer to previous events in each next game.
Recommendations for every game:
LOOK EVERYWHERE (you never know what sweet upgrade or stack of cash may be hiding in the corner)
TALK TO EVERYONE AND OFTEN (sometimes they unlock missions, sometimes you find out more about the character, sometimes they have nothing to say and are in the middle of some calibrations, but talk to everyone a lot)
I will recommend characters to take with you on occasion when a particular character has a lot to say about a mission or has big lore elements, while staying as spoiler free as I possibly can.
ENJOY!
For your first playthrough, I would not recommend using any mods.
For your next however. Recommended Mods.