Re: WDYT of these names for twins?
If you like them and they have special meaning for you then by all means.
For me, personally, they aren't my style. Damon reminds me of "demon" and Damian from the "Omen." I just can't get past that and it is completely my fault. Drake ... is a duck. A male duck to be exact. I have a friend who married an avid duck hunter and he named his son from his first marriage Drake. Its kinda hillbilly for me.
I think why they're working for you may be because of the long "a" sounds in each. Repetitive sounds and order are attractive to the human ear.
All in all, don't care for them and I apologize to you for that.