If any other teams are playing, then I will go for entertainment.
Seriously, I think in football every club is trying to have a good mixture of both. Winning because that is what really counts at the end and entertainment for the fans who are paying to see the matches .. but clubs are very different (largerly due to the coaches styles of play) .. some prefer a solid effective line-ups while others prefer attractive fluent line-ups ...
We can take example of Juve. This season they had some boring games, for example Juve-Brescia 2-1. Before DP's great strike, the game was boring and tedious and going for a draw. In fact I was disappointed at how poorly we played; yet when the winner arrived I was very happy and 'entertained' cos we grabbed the winner.
On the other hand, check out the first leg vs man utd. We played extremely well, and impressed and entertained people. However we lost and were nearly out of the CL.
So would you rather entertain but lose, or bore others and win?
For me irrespective of the way you achieve wins, if you do achieve wins, your fans are always happy and entertained. In other words, win win win