If you:
are exceedingly good lookingwant an exceedingly good looking character to matchwant others to know you take looking good seriouslyhave a penchant for homoerotic machismo
pick
edit: under duress of spirit juice I'll add information relevant to those other than me. none of these really changed my decision to main Jin, but others might find it interesting
If you:
want fatty aerial hitboxes (j.B, j.C, j.2C)want hundred-hand slap (cccccc/sekkajin)want a super that combos into itself (632146D/Ice Arrow)want combos that build stupid meter (any combo with sekkajin)*want decent cross up options (IAD j.D, IAD j.236D, j.B/j.2C)want the most annoying pressure normals in the game (2A, 5B,, 6B, 6D j or dj. B/C/2C)want nice anti-air (dp A/D, 2C, 6C if you're smooth, neutral j.C*)want a grab that combos into itself against those who don't expect it([b+C, 214A] x n)want the most humiliating normal in the game (6a)want s-tier tickthrow setups (2A 66, 6D 66, 6B 66, 5A, 5B)want to spend meter to continue combos (corner 214D, corner 623 D)*want a full screen punish super (632146C)want to do stupid stuff and get away with it (2aaaaaa *wait 2 seconds* ice arrow)want an astral that's very easy to land (grab -> astral)want decent meaty game/okizeme (3C->236C, air grab tech -> j.C, [2a] x n)*
then is alright... I gueesssss....
note: * means more applicable to continuum shift than in calamity trigger