Why do they need to be 'happy' about it, though? I'd be willing to use any of those, but I wouldn't enjoy working with them as much as I would with others. Does that mean I have a "wanky" attitude and immediately disqualify me?
I can be super happy to work for company after year or so when I get to know how it is to work there. Before that I can be interested or looking forward to get to know how it is working for them.
Meant to write 'employers'.