Please, do notice that this list is based on my own experiences, testing and things I have heard from other people. I also tend to give some special tips for each lev. If somebody writes article about this feel free to paste things from this post... Also feel free to share your opinions if you think some lev is definetly wrong, since I cant know 100% all the benefits with all different comps.
1.Warm up OFF
- According to own testing and what Karlis have said, this is definetly an vsync off lev, and the higher fps the better. The turning is very hard with vsync on, no grip
2. Flat track ON/OFF
- Personally i made 15.43 with vsync off and it was somewhat hard. I havent tested with vsync on, but Ive noticed that short 'jump' levs, such as steppes and freefall, are better with vsync on. So I recommend vsync on though i think its kinda on/off lev
3. Twin Peaks ON/OFF
- Kinda same like with flat track, on/off lev
4. Over & under ON/OFF
- Damn, Im starting to feel im repeating here, havent played with on so id go for on/off
5. Uphill battle OFF
- Not much else to say, simply off works with all styles, old and current, much better than on
6. Long haul ON
- Ok, first on lev. I bet some of you disagree with this, but since I made wr much more easily with on...

7. Hi-flyer OFF
- No doubt, bounce lev so off
8. Tag OFF
- Havent tested with on but I bet with off there's much better grip in the end. And again I gotta say that I choose this setting because I got wr so easily
9. Tunnel terror OFF
- Havent tested with on, but doubt it would be any good since the lev has bounce / hang part(s)
10. The steppes ON
- I made my best time with off, but I really would go for on
11. Gravity ride OFF
- Id go for off without further explaining
12. Islands in the sky OFF
- Another bounce, another off
13. Hill legend OFF?
- Ok, this is an interesting lev. With off the first turning is very easy (and I dont know if its doable with on at all), but then the fast spinning in the end is very hard. With on im not sure about first turning but the spinning is radically easier, I mean its EZ. Anyway Id go for off because sometimes you get so god damn good start speed that you simply cant f*** up the spinning.
14. Loop de loop ON/OFF?
- Always used off so thats maybe why I have always had sucky time on it. Dont know does it matter do you have 18.0x or 17.9x though, choose yourself. (Id go for on if I started hoyling it now

15. Serpents tale OFF
- I think that any style on this level is much better with vsync off and especially when we are talking about the wr style...
16. New wave OFF (maybe on)
- I love this level with vsync off, so smoooooth and ez until I get to the hanging part, where luther still wins me over 0,50-1.00, and I think luther made it with on.
17. Labyrinth OFF
18. Spiral OFF (ON?)
- I did my best time with off. Dont know much about this lev
19. Turnaround ON/OFF
20. Upside down OFF
- The hang...
21. Hangman ON/OFF- I think on is better in this because its a short lev. Though I made my best time with off...
22. Slalom OFF
- Havent tested on, but this is just an off type lev
23. Quick round OFF
24. Ramp frenzy ON/OFF
- Start is MUCH easier with on, but like said, vsync off has better playability, better grip etc...
25. Precarious ON/OFF
26. Circuitous OFF
27. Shelf life OFF (if u cant enter hole change to on)
- Very problematic lev, let the title speak for itself
28 Bounce back OFF
- And again Id go for off, just for the playability
29. Headbanger ON
- surprised? hehe, finally a lev I have tested much with both settings and on is much better
30. Pipe OFF
31. Animal farm ON
- Definetly on if you are going for the 'bird bounce' (at start the strange wheel hooked bug)
32. Steep corner OFF(ON?)
33. Zig zag OFF
34. Bumpy journey secret =D
35. Labyrinth pro ON/OFF
- I go for off, luther goes for on. You decide which is better, 2:19 or 2:18
36. Fruit in the den OFF
37. Jaws OFF
38. Curvaceous ON
- Always played with off, but when I tested some with on it feels much easier
39. Haircut OFF
- Just try wr style with on and you'llunderstand why off
40. Double trouble OFF
41. Framework OFF
42. Enduro OFF
43. He He!:D OFF
- He He
44. Freefall ON
45. Sink ON
46. Bowling OFF
47. Enigma OFF
48. Downhill ON
49. What the heck OFF
50. Expert System OFF
51. Tricks abound OFF
52. Hang tight OFF
53. Hooked ON (off?)
- I use off, but I think on is better with this lev, just like with all the short ones
54. Apple harvest OFF
Sorry that some levs doesnt have any details why, but had to hurry a bit until the end

Like you probably have noticed, I generally support vsync off, but in general it doesnt matter _that_ much with what setting you play. Just remember to use off with bounce levs. ALSO NOTICE that the difference is very slight in most of levs and is only noticed after much hoyling