Yeah, I grabbed a couple great games but unfortunately didn't hit well with the controls. A lot are designed to work best with dual analog. No real way to know without trying it though
I got and enjoyed these so far (most much higher price now - might try waiting until the encore sale):
Nidhogg ($3) is an awesome/perfect cab game - but you can always go the free route (which I think I even prefer) in Eggnogg++:
http://madgarden.itch.io/eggnoggBlaze Rush ($3) - looks like a fun racer which might be good for a 4 person cab - need more testing on controls.
Gauntlet ($10) - reboot - mixed reviews. I actually really liked it, but not sure yet on the controls
FORCED ($5) - Action/Puzzler - seems really fun - unfortunately it feels like dual analog or bust
Renegade Ops ($7) - Action/shooter/driving - dual analog or bust... I think.
Trine 2 ($3) - Puzzler - almost Lost Vikings like with beautiful graphics and multiplayer coop. I don't know yet how the controls translate.
Awesomenauts ($2.50) Didn't play much yet and I believe there was a lot of controls to map.. but seems fun.
Shank/Shank 2 ($5ea) is great - but lots of button mapping.
Strike Vector ($3.50) and Mutant Storm Reloaded ($5) might be good for the shooter-freaks out there. Again, controls probably not goot for a cab.
Castle Crashers is a good suggestion - although I have not played it.