5% hit chance

[Substetly]

Im missing with Kidney Shot though i have over 5% hit chance. 5% hit chance is a must have for not missing with special abilities but it does nonetheless.

[Cube]

That's because you're probably playing on the TBC realm, and in TBC everything has 1% chance to miss which you can't counter with +hit. This wasn't removed until WotLK came.

[Peekaboo]

Only spellhit capped at 1%. Physical misses could be removed from the table, but kidney shot can be parried/dodged and not to forget resisted.
Also keep in mind that some classes can increase the miss chance through talents (frost mages), or +def gear (trololol). In PvE you need 8% hit against lvl 73 (skull) iirc.

[Toosh]

I thought TBC had 9% with 2-handed normal swings / any special hits, but way more for dual wielding white attacks.

[Peekaboo]

Hm not sure on that one, the eight somehow managed to slip into my picture. Could be 9% aswell, dual wielding should be 24% though (19+5, so 27 for PvE, or 28 =p).