Ako rin, Vista gamit ko sa Home PC ko with Service Pack 2. With the original release of Vista(without Service Pack), marami talaga bugs. Bigla na lang mag-e-error lalo na yun mga installers, with no reasons. Magtataka ka na lang. Mabagal din ito. Pero starting Service Pack1 and now Service Pack 2, running smooth na. I'm not into games, so I cannot attest its compatibility with Games. But as for me, wala ako problema with playing videos, application that I used, specially virtualization.
But, we cannot deny...XP is still fast compare to vista as vista need higher specs as compare to XP's system recommended hardware requirements. But with hardwares' prices going down, masarap mag-upgrade at masarap gamitin ang PC na mataas ang specs.
I have both OS, in home and office...Vista and XP, no more Windows 98