What is your most important project that the band could or "should" work on in its short to mid-term (x2 questions there) future?
Put out that album they've been working on since 2012. NOW! (or 2015 the latest)
Do you like a certain band member more than another?
Yes.
Do you like a certain songwriter more than another?
Yes.
Would you be interested in a C. McVie/John McVie and S. Nicks collaboration? Or not so much?
No.
Do you think the bass line of songs lifts their atmosphere or do you prefer seeing Stevie and Lindsey on stage alone or with just, Mr Fleetwood?
Yes to bass. since you specifically ask, i prefer not having to see Stevie on stage. 
Do you believe in this band's collective willpower overthrowing any selective interest groups, or not really?
There is no collective willpower. And interest groups assertion is a good one. Seems that since Mick got them in trouble with his bad management skills during Tusk tour, they've been bowing down to selective management / interest groups to make sure they actually make money on tours... and that has put them in a completely different corner they are apparently willing to stay in.
Do you think that these people are smooth musical operators?
No.
Or do you think they are a promotors' "worst nightmare"?
Probably not.
Do you believe in word of mouth or do you favour the Internet and the social media spread of words/written texts?
What's the difference (unless you take the mouth part literally )? Isn't social media word of mouth these days?