I try to watch TLK 1 and/or 1.5/3 at least every few weeks. If I go months without watching it, there's a high chance I could lose TLK and Timon once again. And I don't see anything wrong with watching it every now and then. Just like Tacobell Lion said, it's good stuff. And quite frankly, it's has lots of meaningful life things to see and rethink on time after time.
I feel that anyone (not necessarily here on MLK) who goes for months and months without coming back to the original source of their interests, are moreover, hurting themselves than helping.