What are the drawbacks to choosing a higher voltage ceramic capacitor vs a lower voltage with all other documented specs being equal? If I'm not mistaken, higher voltage rated caps for electrolytic caps result in a larger physical size as well as higher ESR. Just don't know what differences there are in the ceramic caps. Maybe its just a batch/bin type of rating.
AVX 08055C152KAT2A 50v, X7R, 0805, +/-10%, 55-125 deg C
AVX 08051C152KAT2A 100v, X74, 0805, +/-10%, 55-125 deg C
Hmm... getting up in the >.1uF range, it looks like cost is a difference. A 1.0uF cap from Murata, 10v cap vs. 50v cap, is about $0.07 vs $0.29 (Digi-Key 100 qty pricing). I may have to sort my list and find cheaper lower voltage parts for everything over something like 15 cents. Heck, who cares about the expensive ones. So long as I have a cheap 0.1uF, some cheap pF, and a cheap 1uF I should be good.