Names that really pique your interest or have some deeper meaning or just sound really cool.
For me, I like a lot of SMT/Persona titles, particularly - Nocturne's Japanese name, Lucifer's Call and the Persona 2 duology, Innocent Sin and Eternal Punishment.
Were there any games you liked in part because of their title?
The Castlevania games with subtitles are always great. Nocturne in the Moonlight, Rondo of Blood, Aria of Sorrow