When I used to use Skype on OSX I always hated it, people talk about iTunes being bloatware but the amount of resources Skype used was obscene. The final straw was a bug they never fixed that would log me out of Facebook in Safari every time I opened Skype. It was something to do with the fact that I'd foolishly linked my Skype and Facebook accounts in the past, I'm not sure if even to this day they ever fixed that.