This is my global gitconfig (minus personal things like user.email etc):

  [core]
       pager =
  [pull]
       ff = only

I don't want git to start a merge without my explicit request, hence the ff-only on git pull. Similarly, opening a pager without me explicitly asking for it is an antipattern and I can't stand tools that do so by default. My terminal has scrollback history TYVM.

  [push]
       default = upstream

I think this is the default now anyway, but I don't want git assuming anything about remote-local branch relationships.

  [alias]
       tlog = log --graph --oneline

Simple git tree-log shorthand.

  [status]
       showStash = true
  [stash]
       showPatch = true

I always tend to forget when I stashed something, so I need the explicit reminder. The second one makes git stash more like git show.

Most of my personalizations are through aliases, but another no-brainer is

[interactive] singleKey = true

and I'd recommend are

[gc] reflogExpire = never reflogExpireUnreachable = 150 (or another high number)

.DS_Store

*.swp