being mainly a jammer, I start jamming with the easiest set available (usually Scaler, AAS Strum GS, BB and a solo instrument)
Then, if something interesting jumps out, I switch to Toontracks and record, but it happens rarely
After I found the workflow explained here, I start sometimes with Scaler and EZKeys, but now that I have Minimonsta, I think my starting point will change again 
BTW, I think that Minimonsta can be very useful for soundtracks