I like...
AaronAbdulazizAbdullahAbelAbrahamAbramAdamAddison - Awesome for a boy!
Adolfo - love it!
AdonisAdrianAesonAesopAgustinAhmedAidanAlanAlaricAlbertAlejandroAleksandarAlexanderAlexavier - I went through a phase when I was about 14 where I thought Alexavier was an awesome middle name for a boy.
AlfredAlgernonAliAltonAmirAmos - love!
Amyas - Also love!
Anakin - I wouldn't use it, but I like the sound.
AndersAndonAndreAndreas - love!
Anthony - Old pronunciation, ike
Antony.
AntonyApolloApprentice - Sounds cool! Rather feminine though.
AriArloArmandoArsenioArthur - Would use in a heartbeat.
AsherAspenAtticusAubrey - Would also use in a heartbeat.
August - and this.
Augustin - and this one.
Augustine - this one too.
Augustus - and this one.
Aurelius