At 190lbs and ~16% BF, you should only need about 2300 calories a day to cut. Sounds like you got that down. For me, a 40/40/20 (P/C/F) ratio seems to be working well, but I plan to start carb cycling as soon as I can see my lower abs. (whenever that is!

). I highly recommend either hiring Bobo to help you along w/the process (he'll show you the right way the first time, well worth the investment), and checking out 'Burn the Fat, Feed the Muscle', an ebook by natural bodybuilder Tom Venuto.
It seems like the more you try to research cutting techniques, the more conflicting and confusing information you end up with. After failing miserably my first attempt a couple years ago (losing a bunch of muscle), Ive finally got it down for the most part but like you this is my first 'real' cut where Im actually pleased with my progress. Its basically eat real clean, refeed to maintence cals every so often (about every 7-10 days seems to work for me) - and never underestimate the fat loss power of cardiovascular training. Dont believe any of that 'cardio is catabolic' BS. Sure, too much of it is, but as long as you keep your sessions between 20 - 45 minutes you're good.
Well i chose 30 mins of walking after weightlifting sessions. Would split them up but I don't have the time right now... When it's nicer out i think that won't be a problem. Also i get a lot of cardio in at school... i walk around 2-4 miles most days there. Then weekends i work... I'm the jack of all trades supervisor at a 4 star restaurant in MA and this requires me to be here, then there, move that there, help them over there... etc you get the gist
Post workout cardio is actually pretty beneficial in terms of fat loss because your glycogen stores are depleted after weight training. I like to keep heart rate around 130-140Bpm, so its either a light jog or a brisk pace one the elliptical machine.
I used to work in a restaurant too, so I know you're running your ass off

Its probably enough, but it seems like the more cardio I do, the faster the fat comes off. Right now Im running ~15 - 18 miles a week - I sit on my ass all day at work though so I kind of have to.
As for controlling appetite, the most effective supplement Ive tried by far is the ephedrine/caffiene stack. Not only does it acclerate fat loss but Im not nearly as hungry and sometimes I even have to remind myself to eat.
A low dose of ephedrine (start with ~6mg 2x per day) combined with USP Labs C2, or Desginer Supplements Basic Cuts would be a great addition to any cutter.
BV
I slowly reduced it from 5000 at max bulking to 4000 then 3000 now this week it's been around 2350.
In the future, you may want to keep the bulking cals to only around +500 - 800 over maintence. I did the 5000 cals a day thing too for a while and I definitely got big, but with a good amount of chunk that Im working my ass off to cut off now. From now on its lean bulk only for me, but i guess it depends what your goals are.
Good luck with the cut!
BV