The most important thing is when one or two ip involved in spamhouse it listed whole subnet as spam sending and try to put pressure on ip owner to justify the reason of spam which is not possible in every situation.
We also use WHMCS support system.
1.One account for support executive for client view and ticket
2.user friendly
3.Easy to search
4.Much more features it provide.
You can checkout servermania,colocrossing,quickpacket,datashack,delimiter There are so many provider they will arrange a server for you according to your need.
You can check this link.
http://lowendtalk.com/discussion/22098/tactical-vps-big-ram-specials-openvz-in-l-a-great-connectivity-to-asia#latest
It may help you.
As a employer i will look
1.Honesty
2.common sense
3.confidence of employee
4.ability to learn new things
and much more things....But honesty is the main thing.