I just picked up Anger of Angels next week, and am reading through it. Very cool book.
One thing I noticed is that half-celestials are considered "angels" whereas aasimar are not. The book also mentions that angels are immortal, never dying of old age.
Does this hold true for half-celestials in the Anger of Angels universe?
The second question is whether any creature that is considered an "angel" can take any of the angelic feats as long as they meet the other prerequisites. Could that half-celestial take an Extra True Vessel?
Finally, would it make sense to have some of the angelic feats be compatible with the exalted feats from the Book of Exalted Deeds?
Banshee
