RE: Otter tells supporters he'll seek a third term as governor/Eye On Boise

Betsy Russell/Eye On Boise: Otter's decision, if he sticks with it, would depart from the example of one of his mentors, former Gov. Phil Batt. Batt, then 70, stunned supporters in 1997 when he announced that he wouldn't seek a second term as governor, noting, “If I were to serve out another term, I would be nearly 76.'' 
The successful onion farmer and longtime Idaho politician said he'd decided it was time to “step aside'' in favor of the next generation of Idaho leaders. Otter is 69, and turns 70 in May. If he served out a third term, by the end of it in 2018, he'd be 76. More here.

Question: Why would Otter want to be governor for a third term when he seems lukewarm about the job now?