Ah Sandra, people I see on TV who've been over-enthusiastic with the Botox look - well- weird. As you say, mask-like.

There's a fascinating TV programme on at the moment called 'Botched'. It's about two American plastic surgeons in California who help people who have had disastrous operations and work done on their bodies and faces. (Doctors Dubrow and Nassif)

They get deranged women with lips like grouper fish, wanting yet more filler added. Fortunately, they're very ethical and their aim is a natural look, so these types of client are refused.

There's a similar one called 'Atlanta Plastic', where the surgeons are forever liposuctioning fat ladies and poking implants into their busts until they look positively pneumatic.
Most interesting, but I'd never go in for anything like that.