tig is great, it's my go-to git client on all my machines. Only since I use tig I understand how to commit hunks. It's super easy to split the changes of a file into different commits that make sense. With most other clients this is either cumbersome or not possible. So your forced to always commit all changes of a file in one commit. I guess it just really works great for my workflow and the way I think about my rep…
Out of curiosity what's wrong with git add -i? That's what I use to stage parts of a file.
I've used Tig daily for years (about ten) and basically use it for for quickly browsing the log and changing what's staged - probably less than 5% of its features.
Everything else I do via the command line with ZSH's excellent git completion.