If there was a romance pack I really wish for unrequited/one-sided love, and heartaches that comes with it. I'm a little bothered that you can basically make any sim fall for your sim... I really want my sim to suffer because their love interest is talking/flirting with someone else lol. Would be great for teens especially. Also interactions like teasing someone about their crush for kids. Kids should get cute crushes too, it's not like elementary school students live without those.
Aside from those, maybe bronze/silver/gold wedding anniversaries etc and weddings themselves should get more stuff/venues. Like others have mentioned, some sort of attraction system would be nice... And online dating please! Either from the phone or from computer. You can already have penpals so why not long distance online romances?
Also return of the gold digger pls lol.....