capricious

arbitrary careless erratic fickle flighty helter-skelter impulsive quirky temperamental unpredictable unreasonable unstable volatile wayward whimsical

any way the wind blows blowing hot and cold changeful contrary crotchety effervescent every which way fanciful fitful flaky freakish gaga humorsome inconstant kinky lubricious mercurial moody mutable notional odd picky punchy ticklish up and down vagarious variable yo-yo

cautious constant predictable reasonable reliable sensible stable steady thoughtful unchanging

dependable staid steadfast