This may be a bit out of date now that Sabayon 5.2 is out but, having borked my system to the point that I needed to re-install from my 5.1 DVD, here are the post-install steps in one handy location.
Bring the package list for the package manager up to date. There are several steps to be done and some of them take a while, but it’s a one-time deal (unless, like me, you keep breaking things).
The update notifier should now inform you that there are lots of updates to install. Start Sulfur and install them. It would probably be quicker if I did this from the command line, but I do like the fact that Sulfur tells me what I’m installing.
This, as far as I can see, brings you right up to the current release so there is no need to make any changes to repositories.conf. Instead, you can go ahead and start installing all of the normally used applications. There is a minor ‘gotcha’ to bear in mind here – Spam Assasin isn’t installed by default so it needs to be manually installed before you start Evolution.
On the whole, I do like Sabayon. When it works it’s a stable and reliable distro but, when compared to Ubuntu, if can be a bit too easy to break.
I have (very briefly) looked at a few other distros but the only two I have so far installed are Ubuntu and Sabayon. Ubuntu does do a great job of shielding the end-user from the complexities of the OS and, as such, makes for a great first distro. Sabayon, on the other hand, does expect you to have some idea of what you are doing. And I want to gain a better idea of what I am doing, what is generic, what is good practice and a better understanding of how the various distros compare.
I am planning to stick with Sabayon for now, not least because of its visual appeal, but it is also entirely possible that I will give another distro a spin at some point.