And also, you can check Flat'n'Simple (Win9x style), Corporate (easy pastel colors), Lite-On (another pro looking skin) and many others... everyone has a choice and that's best of all. We are not forcing anyone to use them, it would be unfair to users, but we gave you oportunity to change the look of your avast, just in case you want to do that, the way you would like to see your antivirus look like.
Good thing is, we also have DISABLE skins option in avast! v 4.5, so something for anyone.
Cheers !