I do .. I never change my formation based on the opponent team .. I think that the players make the difference not the formation .. I ony lost 3matches in this season and i will show u the results of 2of them, home and away ..

Click image for larger version.  Name: MU vs pue 1.jpg  Views: 49  Size: 91.3 KB  ID: 12258Click image for larger version.  Name: MU vs pue 2.jpg  Views: 39  Size: 52.2 KB  ID: 12259Click image for larger version.  Name: MU vs pue 3.jpg  Views: 37  Size: 93.6 KB  ID: 12260Click image for larger version.  Name: MU vs pue 4.jpg  Views: 37  Size: 52.4 KB  ID: 12261Click image for larger version.  Name: Mu vs tasmania.jpg  Views: 32  Size: 90.2 KB  ID: 12262Click image for larger version.  Name: Mu vs tasmania1.jpg  Views: 32  Size: 91.4 KB  ID: 12263Click image for larger version.  Name: Mu vs tasmania2.jpg  Views: 35  Size: 51.7 KB  ID: 12264Click image for larger version.  Name: Mu vs tasmania3.jpg  Views: 34  Size: 52.8 KB  ID: 12265

as you can see i played with the same formation all those fixtures but the results are very different ..