If it was 2008 I would recommend everyone to use Windows XP but in 2015 there is no meaning of using Windows XP if your system supports the latest technology.
Reason behind opinion is that XP is good but the latest technology is made with understanding what we need. The things Windows 10 can offer Windows XP never can. So why use the old technology? And also you will not be satisfied with the user interface of Windows XP.
I recommend everyone to use latest versions.