After playing for a while it seems that almost every character has a "heart" option (far left option), even some characters off the ship that I wouldn't have expected to be able to flirt with!
Are all of these romance options equal or are some of them just flings?
Who are you able to romance in Mass Effect: Andromeda, as each Ryder?
Best Answer
According to this source (which seems consistent with other sources such as PC Gamer and IGN), this is the list of characters with whom you can romance.
Edit: Added some known commitment requirements for certain NPCs.
Notable:
Tips from the IGN guide:
Also noted about the romance system by the producer: