Umm... Experience is the best thing to have... assuming that there will be no problems while doing all sorts of experiments.
alternatively, that problems if any will teach us.
let me tell you... It is not that much fun compared to having full swing dual boot system over the virtual box OS. However, it is not a bad idea to have Ubuntu handy in virtual box without having to reboot the system.
I had a problem of screen resolution. The darn thing would not resize itself to higher resolution... it was solved by installing some Vboxadditions that came along.
I still do not have any idea what happened except that after banging your head here and there... pulling hair and moving hands like crazy ... sometimes works!
I am not much of a GEEK!