Thanks for the Cache!
TFTC is a popular way of signing logs on Groundspeak, it’s polite, It’s quick. It’s easy. It’s not particularly meaningful.
Some geocachers prefer longer logs. What brought you to the cache? How was the weather? Did you have any adventures on your way?
The length of the log, in my opinion, ought to reflect the thought placed into the placement. Skirt caches might only rate a TFTC but a rating of 3 or higher ought to be more detailed. The placers of these caches worked hard to place these caches; their only reward is the log.