I find that if you write a character well I will care about them. So I like in the DS9 relaunch I came to care about Shar, Ellias, Prynn and so many others. In the TNG relaunch I was heart broken when Choudhury died; I want to know more about all the characters.
Pretty much this. I wouldn't care at all if the crew of the aventine, titan (sans ree), DS9-R & the Ent-e newbies turned into space butterflies(I laughed when Choudhury died).
I grew to like pretty much all the new frontier characters, guys like nahrat & harb from the eighties stuff, the errand
lower deck guys and KRAD's gorkon crew.
sometimes it works, sometimes it doesn't, sometimes it complements whats already there and makes it even better, sometimes it doesn't. Don't want them to stop trying though