I took a look at all of the shortcuts that Vimium offers, and beside the f/F to open the link, other shortcuts are already available natively in Chrome, like:
* arrow keys/PgUp/PgDn for scrolling
* Ctrl-PgUp/PgDn for switching tabs
* Home/End for top/bottom of page
* Ctrl-U for source
* Ctrl-L for switching to the omnibox
* etc
I guess some people might wince at the fact that they have to touch the arrow keys or Home/End/PgUp/PgDn, but my keyboard has those keys and I'm used to it.
Besides the fact that you leave the home row, I'm not sure why but scrolling is quite significantly better when using vimium, at least on macOS.
Using the arrow keys makes the page scroll jerkily, in a way that complicates reading while you move. Using j/k (or u/d for fast scrolling) produces a smooth result similar to scrolling with the touchpad or a phone/tablet scroll.
There's also H for opening a previous history entry or switching to a different tab you have open. This is a big one for me (along with the Auto-Discard extension) since it lets me keep a very large number of tabs open and not have to iterate through every open tab when I want to find something I opened previously again.
I use a 60% keyboard, so the arrow keys map to "fn + WASD", which gives me the 'benefit' of not having to move my hand to a dedicated mouse cluster while still being an easy to use key-combination as WASD is natural to gamers.
I mean in the end, who really cares though? Whatever is comfortable to you is probably the best choice.
* arrow keys/PgUp/PgDn for scrolling
* Ctrl-PgUp/PgDn for switching tabs
* Home/End for top/bottom of page
* Ctrl-U for source
* Ctrl-L for switching to the omnibox
* etc
I guess some people might wince at the fact that they have to touch the arrow keys or Home/End/PgUp/PgDn, but my keyboard has those keys and I'm used to it.