Looking at the guys who are working at store in Moscow I don’t really see anything attractive about their jobs: mostly they are answering questions of parents like “well, and what is exactly the difference between this $300 instrument and this one for $3000?”. In case with me, their job is just to plug in a power cord to a keyboard I want to try, sometimes to put a keyboard on a stand. In a room where someone is always trying a keyboard without headphones, there’s no much opportunity to just play all day yourself. Obviously, I’m speaking about a large store. Small stores can be more peaceful, but I’m not sure that small stores will be selling something like SX900.
Speaking about smiling — is sounds good, but when you actually get to recording your performance your primary intention soon becomes not to mess it up; all flaws are much more noticeable when it’s a recording – that’s why artists often say that something it’s easier to work a full concert live than to make one song in a studio.
But ... a lot of times, 'these errors' sometimes make it into the actual song as well, and they become big hits :-)