I like a 90 on some set-ups and a 45 on others, I don't think there is a complete concensus on a preferance even if there might be a majority that follow the trend for 45's at the moment.
Flippant remark John...I'm not aware of many after market 90 Degree grips for Angels...so was guessing, the Hybrids etc, Dye stickes and so on...not based on any facts mate!
I have to warn you, you cannot put the LCD board inside the 90 Grips as it doesn't fit....trust me, a friend of mine wanted to experience it so we tried it with mine! sorry buddy.