flash filters

I was playing with my flash the other day.  I have a bunch of filters for it too.  I'm not sure if I would ever need to use them seriously.  Here are some pictures using the blue and pink filters:

The first two photos used the blue and the last three the pink.  I don't like it when you can see the drastic shadows caused by the flash (1 and 5).  The pictures of the christmas tree and the tree trunk however have a more natural look.  Maybe I'll try using them again sometime.  

It's been so cold lately that I haven't had any drive to go out taking pictures! 

Let me know which one of the above is your favorite :)