If uR reselling domain name:

1-Customer mostly ask for Control panel?
2-They just want register domain?
3-Most of they care mostly about price?

I believe the order goes this way:

3.
2.
1.

well , then, if the customer owns tons of names, 1. eventually will be a key considering factor

I have to agree with silhouette here. Most customers go for the price, then the customer service, then the control panel.

i'd say
3
1
2

My experience said

3
2
1

3 - 50 %

2 - 30 %

1 - 20 % ( They normally do register domains on regular intervals )

from experience

3
2
1