Ok, because I haven't done so in awhile, here is some Flash casting ideas of mine:
Wally West: Ryan Eggold - Yes, this is the English teacher from 90210. But don't judge a book by it's cover, or in this case, the actor for which show he appears on. This guy has talent and I see tons of potential in him. Eggold is 24, has the build for Wally, has a good guy vibe to him, can do the Wally humor along with the proper range to make you believe in him as a hero.
http://www.imdb.com/name/nm2375297/
Barry Allen: Peter Krause
http://www.imdb.com/name/nm0470244/
Jay Garrick: Michael Biehn
http://www.imdb.com/name/nm0000299/
Linda Park: Linda Park
http://www.imdb.com/name/nm0971133/
Iris Allen: Moira Kelly
http://www.imdb.com/name/nm0446702/
Tina McGee: Amy Acker
http://www.imdb.com/name/nm0009918/
Reverse Flash: Christian Camargo - I personally believe that the best thing to do with the Reverse Flash is combine all three, The Rival, Eobard Thawne, and Hunter Zolomon. OR you could combine The Rival and Hunter Zolomon, while saving Thawne for later down the line. In that case, I want JAMES FRAIN to play Thawne.
http://www.imdb.com/name/nm0131235/
Jesse Quick: Scout Taylor-Compton
Max Mercury: Still working on this one.....