Ok, so if I have to vote to keep my post alive, here's my vote. And I've consolidated my other posts into this one. Although, again, I'll point out that the value of the cards depends on the level of Difficulty.
Agoge (17)
Colonization (17)
Corvée (15)
Conscription (12)
Discipline (18)
God King (13)
Ilkum (15)
Inspiration (9) (12-3) I never use Inspiration (+2 Scientist points). But I play at Deity (on a standard-size map), and the AIs are way ahead in getting Scientist points.
Land Surveyors (12) (11+1) If I'm in a Republic, and not building settlers or builders, it's one of two reasonable options for that extra economic slot. And Caravansaries has already been eliminated. Plus, I'll suspend Urban Planning to use it when I'm switching policies again in 1-2 turns, to buy several tiles.
Limitanei (12)
Maneuver (15)
Maritime Industries (15)
Revelation (4)
Strategos (16)
Urban Planning (20)
A lot of the cards may not be useful generally, but can be very useful situationally. I don't employ God King often, but if a village gives me 20 faith and I only need 5 more for a pantheon. Or if I'm playing Sparta (Gorgo), I can use extra wild card slot with Strategos to get an early Great General. And Limitanei (+2 loyalty with garrison) helps with forward settling. Revelation (+2 Prophet points) might make the difference between getting a religion or not. Except for Inspiration, I've found reason to use them all.
And maybe even Inspiration, if I played Pericles (so I didn't have to wait for Political Philosophy to have a wild-card slot), and my first district was a Campus, and Hypatia was available.
Re: Survey
Sometimes I use this before +5 vs barbarians, because it helps my scouts get that first promotion faster.
Sometimes I use this after my scouts have 1 promotion, and I don't have barbarians to worry about (and I'm building settlers or builders, so don't need Agoge). Getting that 2nd promotion makes the scout so much better an explorer.
Sometimes I use this when I'm in a early war with an AI, simply because it's fun to get a scout to a 3rd or 4th promotion.
More recently, I've liked employing Autocracy as my first government (it's like having an extra policy for God King, but better). So I have two military slots, and if I'm not building military, I often employ Survey.
But I can't vote for Survey, because it's been eliminated.
I'm not going to vote for Urban Planning, even though I use it a lot. Because so can the AI. I prefer to vote for a card that's much better for me than for the AI.