Okay, from what you've drawn... (and my moderately better than high-school understanding of the vagaries of plate techtonics)
I'd expect to see a chain of islands potentially occuring between A & B.
B, C & H should be creating some SERIOUSLY tall mountains.
There will be limited mountains between B & D (they're passing plates)
F & I might actually be one plate (they're basically moving together)
F & G won't be likely to have mountains between them.

[2cents] My thoughts...
I would merge F, G & I into one plate subducting under D & H.
I'd probably have E crashing a little harder into D.
[/2cents]
Seems good, but hey feel free to adjust my ideas to better suit yours.