Especially when you do 3D stuff the overhead for a VM is no longer acceptable. So I'm also dual booting. I wasn't sure which FS would work well and made partitions with ext2, ntfs and fat32. But also using ntfs now as it just works good enough (no filesize limit and with ext2 I had the trouble that it wants fs-checks once in a while and if I booted just then into Windows I couldn't access it... also VS had once troubles with files on ext2 for some unknown reason).