Well, I was sitting there and thinking, "Oh how cheesy it is to use words ending in "-ar" in an attempt to sound more exotic - and how often is this done, too". Then I realized that my very username ended in "-ar" (remember its origin?), so I decided to change it.
(Also, the "-gah" ending has the added benefit of being a fitting onomatopoeia for the sound many people probably produce upon reading certain posts of mine)
Now, it's not like "Valaggah" sounds much less cheesy ("-ah" is abused too!), but the "gah" part makes it worth it, anyway.