A romance option that cheats on you.
I want to see the tears.
I'd like to see a romance where you actually have to compete with a rival for the affections of said romance. Sort of like Josephine where you had to duel Otranto but more of a love triangle where the LI is attracted to both the PC and the 'other person'. Would make for more drama if that 'other person' was a crew member or fellow squadmate.
As for my ideas?
Plot:
-You're an anti-villain/active villain with the odds stacked against you. Past several BWare games have been 'hero' and 'anti-hero', but plot twist for Andromeda has you playing for whatever intentions you decide, but it turns out your efforts did far more harm than good. Sort of like how someone might see the Sith Empire as 'serving the greater good' or actively seeking power and advancement.
-Would like to see your disposition/alignment play a role in the story for good and bad. Good guy? Some may trust you but others might view you as easy prey or a pushover. Neutral? They might see you as a mercenary or someone with a flexible morality (untrustworthy to more polarized characters, others might be willing to enlist your aid). Evil? I'd like to actually see a rise to power and it actually play out rather than a 'hero with a slight attitude problem'. Doesn't have to be 'kick puppies' evil, but I don't want to keep seeing my PC pretend to be a hero when he/she is aware and actively knows what he/she is doing.
Squadmates?
-An asari geek who constantly makes awkward mistakes, leading to hilarious circumstances aka Space Linu. Her romance arc could play out like a romantic comedy. Instead of asari = space mage/adept, she could be a sentinel and have extensive tech knowledge.
-A human infiltrator who is an expert sniper and bounty hunter. To counter the typical 'hard human woman with a secret vulnerable side/broken bird syndrome', she's actually very upfront and doesn't have a layer of emotional ice to melt. She's actually not too sappy, has 'been there, done that' (maybe ex pirate? Mercenary? Black ops?), leans strongly renegade.
-A human male Vanguard who has a solid tanking skill tree if you so desire. A bit grumpy, prone to making mean spirited comments, can be bitterly sarcastic. Has a tragic past (ex slave, lived a life of crime) and has a good side but you have to sift through the emotional ice (basically Biotropes gender flipped). Think Bishop from NWN2 or a male Jack (only not psychotic) or Morrigan.
-A female alien from one of the less human, 'weird' races. Like a turian, salarian or a new race. Most of the time the female companions are human or humanish and the males are from the 'cool/weird' races.