You don't think wanting to go after Hidan and Kazuku (when he knew almost nothing about his abilitys) with just Ino and Choji was reckless?
the only time hes ever made a wreckless decision was when he had to stall the sound nin from reaching sasukes rescue team
If Kakashi hadn't been there to go with them they'd be all dead for a long time.
For someone with an IQ of 200+, I'd call that pretty reckless, if not stupid.
And maybe, if someone knows his own jutsus and thinks he is invincible he doesn't really care if he is hit by a raikiri through the heart.
SO tell me where exactly did Kakuzu "fall" into one of his traps hm? and don't tell me the ambush, attacks from all sides can hardly be blocked
For that I too wouldn't call him stupid.
He is just thinking he can't be beat and is acting that way. Just like Hidan is.
"For Feanor was made the mightiest in all parts of body and mind, in valour, in endurance, in beauty, in understanding, in skill, in strength and subtlety alike, of all the Children of Illuvatar, and a bright flame was in him"