If you've been using Subversion or (shudder) CVS, you only have the briefest glimmerings of what source control is about. I don't really like having to dig too deeply into tools that I use. I want them to be easy, but I dig when something's hard.
On thing which frustrated me about Subversion is that fact that, as mentioned, I don't think about some things. More than once I've quickly hacked up a change to a module, switched other modules to use that module and do a quick svn rm and svn add.
Oops. I just lost my version history. Damn it.
Not with git. It figures it out for me. My Veure project uses DBIx::Class::Schema::Loader because I don't want to think about building my schema classes. The 0.5003 version is fantastic. It does a better job of naming relationships and the DBIx::Class::Schema::Loader::DBI::Pg support is fantastic.
But what happens if you rename a table? I've done this more than once on my new project, continually working to ensure that I keep things clean and consistent. Unfortunately, that means that a renaming the foo_bar table to foo means that a different schema class is created, separate from the old one. Naturally, I don't think about this and I do a quick git rm and git add.
And git sees what I did and it realizes that the file has been renamed and I don't lose my history.
From what I read (I could be wrong), git actually uses heuristics to determine whether or not a file has been renamed, but so far it's worked flawlessly for me. I am still using Subversion at work (I've not felt comfortable checking out the git-svn work, but that's me being silly), and it's just painful. I doubt I'll ever use Subversion for a personal project again.
Update: came into work this morning and was asked to merge one branch into another. It was conflict hell and I was having trouble figuring out all of the changes. A colleague, using git-svn, merged the two branches cleanly, no problem. I think it's time for me to learn git-svn now.