I enjoy this way more than Ti, I've realized. Ne provides me with intellectual stimulation, it's creative, it's hilarious, it helps with empathy, it makes me want to do shit.
If we're excluding my two "strong" functions, I would vote for Se. Noticing details, acting immediately without dithering, fixing stuff, crafting things, navigating any social environment, athletic ability. It's the most useful of all the functions, IMO. If society crumbles, it's the Se users who are going to be the most likely to survive. They'll probably be the best at obtaining food that isn't in a supermarket.
Ti and Fi a close second and even closer third. Fi just feels right. Ti helps me become better at being me. Fi at times help me feel closer to the world whereas Ti helps me learn how to act in the world. Fi is harder for me to get unless there's a great degree of intimacy including effusive, open, honest body language or really well-crafted art to share (thankfully many nfps are great writers, including some of my closest friends). but then it's the most inspiring thing that exists, it's so concentrated, even if Ti is equally exciting in its ability to manifest possibilities and believe that all things are possible if you practice asking good questions.