Were to start, After using vista for a few months i got my mac and i fell in love with the operating system. I found i moved around my computer and hard drive contents using leopards finder faster then i did using windows explorer the side bar in finder is quite a lot easier to use the fact you can just drag and drop things into it makes my life so much easier. Another feature vista fails on is backing up your files. Windows fans will say vista has shadow copy but shadow copy backs up to the same hard drive as the operating system which means if the hard drive fails you loose all your data and the back ups were a waste of time. On the other hand leopard has the amazing time machine plug any external hard drive leopard will ask you if you want to use it a time machine drive and it will back up onto the drive keeping your info safe away from your main hard drive. Another feature windows has no equivalent to is web clips which cuts a part of a website and saves it to your dashboard as a widget. Another little thing that i love about leopard is that i can define my own keyboard shortcuts and re-map the one set by apple. Another feature in leopard that vista has no equivalent to is spaces as many will know spaces is a feature which gives you the ability to have up to 16 virtual workspaces rather then having a large monitor or dual monitors i find spaces a great feature i could not life without as it makes me so much more productive when working as i can different things open in different spaces. To be honest i think windows is starting to fall behind and they will really need to do something special in there next operating system to regain my attention. I’am not saying that leopard is perfect because no operating system is but leopard comes much closer to the perfect mark then vista is.