For a light-hearted good time here, pick an airline of your choice and build the fleet any way you choose. Try to be a little realistic with your numbers. For example, I like to see AF & BA have 10 Concordes apiece, not 1000. For my choice, I chose American...this is what I like to see.
A300-605R - 36, up from 34 now.
B737-823 - 185, up from 118 ordered.
B757-223 - 175, up from 151 now.
B767-223 - none. The 757 does the job just as well.
B767-323 - 70, up from 49 plus 9 on order.
B777-223 - 50. Three more than what was ordered.
F-100 - 110. Currently 74. Grab the 40 from USAir, add 36, use 4 for parts.
MD-80 - 365. Currently 362. Add three more, for one MD-80 for every day of the year just for the hell of it.
So that's my dream fleet for AA. I'd just use the existing fleet & twisted the numbers around to my liking. It's all in fun only, not to be taken seriously.
Enjoy & regards.
"Beer is living proof that God loves us and wants us to be happy." --Ben Franklin