My first episode was the Sri Lanka one in TAR6, which started out with a dedication to the tsumani victims. Originally, I was hoping that all the previous seasons would come out on DVD, which never really happened.
First full season was TAR7, so I have a bit of a soft spot for this season. Afterwards, I would drop and come back to this show, thus not following TAR13-15 on CBS. But luckily, someone had the episodes on YouTube (which has since, been taken down).
When the 1st All-Stars rolled around, I would have to resort to bootlegs to watching the earlier seasons, though that would have not mattered for TAR4 and TAR6.