Loose brushstrokes or refined paintings?

[blvnk]

Hello guys! I'd like to ask, if anyone can tell me, if a portfolio has lots of paintings with loose brushstrokes - great composition, values and narrative, of course - are there chances of getting a job as a concept artist? Or are detailed paintings more "acceptable" in the field? What are the fields that looks for artists who can bring a effective results in a short amount of time, with a sketchy style? Does anyone has an advice on creating a portfolio that can get the industry attention? 

Thank you!