After some burning from reddit. I've again realized that I am a stupid person. ( But I'll be better if I keep learning! ) There were bunch of commands I didn't even heard of. After some trying, some of them are really convenient and useful.

Vim habbit

Let's talk about how I use my Vim first.

Commands that I uses are:

a / A, i / I, h, j, k, l, d{motion}, H, M, L, c-f, c-b, t, gg, G, za, v / V, <, >, u, c-r, %, $, ^, 0

Commands that are common to others but I didn't know:

c-e, c-d, c-y, c-u, c, e, U

c is d then INSERT but somewhat better. I typed 1 less key ( yay! ). cc and c{motion} are both convenient commands. Which I use d{motion}i all the time before.

Considering I am using dvorak layout. c-e, c-y are appealing but I need to twist my fingers to press them. On the other hand, I think combinations of H, M, L, c-f, c-b are generally better then c-u, c-d since the cursor position of the later were somewhat unpredictable ( it doesn't always stays at the some position relative to the window if it comes near to the top / end of a buffer ).

Implementations

The motions commands are simple because it's just another case for moveX / Y and panX / Y. It literally takes 1 - 2 minutes to write and tests if it works.

However, what toke me 2 days to craft is that quirky tab character again which I've just discovered it's causing other conditions to fail. Fuck, I think I really need to setup an automated test isn't it?

( Mumbling mumbling ... need to find another machine... )

So ... I'll need to figure out how to implement :'<,'> next.