I like a lot of personal interaction with NPC. Complex friendships, alliances, rivalries, even enemies is good. PoE did this right. I hear Deadfire too but despite pre-ordering & installing it I haven't gotten around to it yet. But the romance options in games are often contrived, poorly handled, and center far too much on solving the romance target's problems. The PC & NPC never come in as equal partners. I can think of very few that were done right. I liked Morrigan's in DA because she came into it with an ulterior motive which made for a good twist. Other than that, none were overly interesting.
I like how Skyrim did it. No real effort was put into it, you can marry pretty much anyone and they all say the same stuff anyway. You could do it or not do it and not feel like you are missing something. Plus no one could complain about being left out. (unless you had a wood elf fetish) But Skyrim was a different kind of game than I think OW will be. You didn't just play Skyrim, you lived in it. Getting married in games that sell you houses is logical. I suspect in OW we're going to be moving around a lot
I like how FONV & PoE handled interpersonal relationships & friendships with companions and wrapped them up with game play choices. I got far more enjoyment from that. So more of that from OW is good for me.