Single letters for powerful names

[Ragnarokia]

Which letters do you feel make names sound powerful? Personally I have a huge appeal towards V, and a lesser extent for Z.
Vladimir, Vincent, Vivian, Weiss etc. the V makes the names sound very powerful and quite awesome, such names being great for use in games and stories etc. to give the indication straight from the get go that that character is going to kick arse.

There are lots of good letters that go together to make an awesome sound, but I find just the V alone at the start of the names can make anything sound great.

Anyone have a similar or different taste for the starting sounds of names, either those of a series of letters or preferbly just a single letter?

[SneakyGameBoy]

D names like

Dan
Damon
Doug
Dale
Dane
David
Derek

WHY D YOU SAY? Because D is for DOMINANCE!

[Mownkey]

F! For freedom!

[CrazySquirrel124]

A, for AWESOM!