Devil May Cry and Shin Megami for me, I have played every DMC game to date (yeah I count DmC there too

) and I really enjoy them (even DMC 2 , people give that game wayy too much hate) . I have played Shin Megami Tensei Nocturne , Persona 3, Persona 4, Devil Survivor I and 2 ,Strange Journey and currently playing Shin Megami Tensei IV... Strange Journey is a really good same , same goes for the rest really and I am really enjoying SMTIV as well.
I porbably enjoy Shin Megami more because I feel that for the most part, most of the games nail the atmosphere down perfectly as well as the music. I've always found mythology very interesting and being able to recruit demons from different mythological settings has always tickled my fancy

. And Lucifer is mostly interpreted in an interesting way (not really being an evil being per say, he's most like a realist, if that makes sense).