yes, i change them every month or so.....the wallpaper and the ringtones.
my laptop wallpaper has pine trees that are covered with snow and a few holiday lights peeking out.
my phone still has deck the halls for its ringtone (lol, i probably should switch that out right?). the wallpaper is live wallpaper with bare trees, covered with snow, near a stream, with live snowflakes falling. the lock screen is a photo i took of fluffy clouds in a blue sky.
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"The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing." - Albert Einstein