Pair Programming
1) Skill set of the person you pair with?
2) Will the partner have the project completion in mind or will that partner be there to try to shine above their partner?
3) Compatability of the 2 people-Have you had to work with someone you do not like?
4) The work ethics comparable to complete the project in a speedy and efficient manner?
5) As previously mentioned the programming styles are they compatible.