It seems there are two things God isn't really happy about in regards to aspirations toward leadership.
The first is "ambition":
- Romans 2:6,8 says that God will render wrath and indignation upon those who are selfishly ambitious. Ouch!
- 1 Peter 5:5,6 says God is against those who exalt themselves, and we need to humble ourselves and He would exalt us in the right time.
- Boy did God become angry with Moses when he asked God to deliver Israel through someone else because he didn't feel qualified (Exodus 4:10-14).
- And God told Jeremiah not to disqualify himself because he was a youth and he was afraid (Jeremiah 1:7-8).
Thus, it seems He wants us to wait (when we think we can), and to be willing (when we think we can't).