Personally, I tend to focus more on what software I want to install, and what version of that software would work best for me. Only after that do I consider from where to get it. As an example, when I wanted to install a PostgreSQL server instance, I considered the version I wanted, checked my distro’s main repository, and ultimately decided to install the official PostgreSQL repository.
Short answer, I choose the repos that offer the software I want.
Personally, I tend to focus more on what software I want to install, and what version of that software would work best for me. Only after that do I consider from where to get it. As an example, when I wanted to install a PostgreSQL server instance, I considered the version I wanted, checked my distro’s main repository, and ultimately decided to install the official PostgreSQL repository.
Short answer, I choose the repos that offer the software I want.