The definition of groove has 2 meanings, 1 of which means the
kinda beat or rhythm that's repeated every bar. another meaning
refers to the ability to play with groove, e.g playing in such a
funky way that it can make people dance or shake their asses
So naturally, styles like R&B and just bout any club beat needs
Groove!
Funk is a genre of music. It basically refers to a band playing in
a very upbeat style, and the main attraction is mainly the rhythm
section- bass guitar and drums.
Jazz is also a genre but it has a very wide scope. It's said to be
the hardest genre in music to play because there's seldom any
preperation- lotsa improvising. that is, a band comes together to
play without rehearsing and just playing whatever they feel on the
spot. therefore, the ability to react to changes and knowing every
note is very important. Jazz drumming is my favourite, cos it
involves alotta dynamics, communication with the other instruments
and also spaces to solo. Examples of jazz- Fusion, swing,
bossanova, ballad's and etc...
Linear grooves are good cos it helps your limbs and mind coordinate
and developing a sense of independence. when done right, it can
sound funky too. lotsa club and dance grooves use very carefully
accented linear grooves.
If you're talking bout 8th notes and 16th notes rolls, then there's
no such thing as 12. 16th note roll is very important, can be
applied in many areas. take it slow, a metronome is advised. take
note, if you're a right-hander, make sure your left hand produces
the same volume as your right.