Yes
Washers failing, washer seat pitting or corroding causing washers to fail quickly, hard to turn - oring needs to be re greased.
This is personal preference and depending on your pressure. mixers need a minimum of 400kpa to function properly, or they wont work, if your pressure is below this i suggest taps. maintenance wise, mixers will last longer, however are costly to replace cartridges, where as tap washers are cheap
shakeproof washers
no you are not but they are a sad thing tho but i like them to and i am sane am i crazy if i like taps? no not at all
Flat steel washers, galvanised washers, ripple washers, spring washers, fibre locking washers.
Yes, all their new washers and dryers are energy star compliant.
Definitely! All you need are a couple pieces of wood, some string and a few washers.
go under the hood and take all the screen washers hoses off and clear them by blowing into them.
taps
Yes, washers can rust. I have seen many rusty washers.
Hand TAPS are usually made in sets of three. Taper, Plug, Bottoming taps.