As a mostly Vanilla person I don't really get into Tinkers Construct and the similar. But as builder I do like mods like
Biomes a Plenty.
Also Mods that add a few extra mobs, even tough ones (as long as spawn rate is not crazy)
Also some older out-updated mods like Minecraft Comes Alive. And ?Decor? (it is better than Crayfish, more variety..Mr Crayfish is cool too_)
I also like Pam's because I like farming.. it is soothing to me., that is why I was first to find this server and get my crew to start coming. : 3
Plus the regulars are friendly, claim system simple and rules good anti-grief policies.
I know there is another mod I liked, it had beautiful magical trees and a creeping corruption., it is rough on resources though. I'll remember the name sooner or later