Currently there are several different types of hand gestures under heart hands.
A: The most common one, heart made with thumbs and other fingers
post #5401703, post #5391704
B: Variant of A, heart made with thumbs and this time index fingers only
post #5391444, post #5388718
C: Similar to A or B, but reversed, an upside-down spade hands
post #5391641, post #5365251
D: Heart made with index fingers and middle fingers
post #5403295, post #5409008
E: Heart made with fingers and wrists
post #5389010, post #5396596
F: double thumbs down
post #4532221, post #4219456
G: mistagged finger hearts
Personally I find them all visually distinguishable enough to deserve separate tags, and I can imagine users looking for arts of one of these specific gestures. I know that it's going to be a mess to clean up but it's better to start now then never getting to it. If that's too much at once, type A, B, D are the most popular ones so they should be resolved first.
I want to hear others' opinions and name suggestions. I don't know if we prefer to keep heart hands as type A, or make it the umbrella, or just deprecate it, so I won't send any BUR yet.