I am the type of person who think that the more money you spend on something, the more use you should get out of it. In this case, since you send a tons of money on a lens, you should use it the most. Generally, I tried to have a range of lens with similar values with different usage so I can use them in different situation with equal amount of times. They are like your children, you should not favor one over others.
Are you the same ?