I ruined my very first Tarot deck as a teen by riffle shuffling it, and I have torn cards trying to do that, as well as doing "weave" shuffle and overhand makes me nervous, as it seems like I collide the cards similarly doing that.
I picked "other" because I mostly do an over/under shuffle, which seems to be what the wiki article below calls a Mongean shuffle. I learned it from somebody here: Holding the deck in one hand i slide the top card to the other hand with my thumb, and then the bottom card with my fingers, and so on, stopping to reverse the cards every once in a while. I will mix it up by passing more than one card at a time, which randomizes less, but makes it quicker.
I will also do the old spread them all out on the table wash when reading for others, and will mix piles if I've been putting the cards in order to study.
http://en.wikipedia.org/wiki/Shuffling