Beautiful results of Rudolph and Boileau-Orevkov characterize those links in the $3$-sphere which arise as transverse intersections with algebraic curves in $\mathbb{C}^2$. I'll discuss work in progress which provides a corresponding characterization of such links in connected sums of $S^1\times S^2$, viewed as the boundary of a subcritical Stein domain (the ball union Stein $1$-handles). Time permitting, I'll talk about further generalizations being pursued with Baykur, Etnyre, Kawamuro, and Van Horn-Morris.
Links:
[1] http://www.mpim-bonn.mpg.de/de/taxonomy/term/39
[2] http://www.mpim-bonn.mpg.de/de/node/3444
[3] http://www.mpim-bonn.mpg.de/de/node/6656