Since my whole computer is in the floor and screens on table, so my optical drive is on top.. Imagine to crouch every time I have to insert a CD/DVD on it.. 
Floppy???.. 
A fan controller right in the botton of the optical drive..
And my HDDs on the bottom.. More because my case it's a MID one, not FULL tower, and no much room to spare with 5 drives..
But, since you ask, for now, I'm into the conventional way... 
Best regards... 
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8320 @ 4,5 / 990FXA UD5 / 7950 @ 1150-6200 / Switch 810 / H80 / 16 GB RAM / 23" 5760x1080 / SSD 64GB RAID0 / Tr2 750W