Personally, whatever is default.

I know that may sound weird, but I’m a huge fan of sane defaults that I don’t even notice are there.

SegoeUI, it’s damn good and well made

Poppins, RobotoMono, Comfortaa and OpenDyslexic

For desktop, I’ve liked Lato, Source Sans Pro, and Inter to name three.

For terminal, I used Iosevka’s customizer to create a gorgeous Fira Mono-like variant that I call Iosevka Firesque:

[buildPlans.IosevkaFiresque]
family = "Iosevka Firesque"
spacing = "term"
serifs = "sans"
noCvSs = true
exportGlyphNames = false

  [buildPlans.IosevkaFiresque.variants]
  inherits = "ss05"

    [buildPlans.IosevkaFiresque.variants.design]
    capital-g = "toothless-corner-serifless-hooked"
    capital-q = "crossing-baseline"
    g = "single-storey-serifed"
    long-s = "bent-hook-tailed"
    cyrl-a = "single-storey-earless-corner-serifed"
    cyrl-ve = "standard-interrupted-serifless"
    cyrl-capital-ze = "unilateral-serifed"
    cyrl-ze = "unilateral-serifed"
    cyrl-capital-en = "top-left-bottom-right-serifed"
    cyrl-en = "top-left-bottom-right-serifed"
    cyrl-capital-er = "open-serifless"
    cyrl-er = "earless-corner-serifless"
    cyrl-capital-u = "cursive-flat-hook-serifless"
    cyrl-u = "curly-motion-serifed"
    cyrl-capital-e = "unilateral-bottom-serifed"
    cyrl-e = "unilateral-bottom-serifed"
    brace = "straight"
    ampersand = "upper-open"
    at = "threefold"
    cent = "open"

Pusab (I’m a gd player)

Since basically forever I use DejaVu Sans for UI elements and DejaVu Mono for the terminal.

Hack nerd font is my go to for terminal use.

I’ve been using Fantasque sans mono for a bunch of years now.

Whatever the default font is

I find comic sans mono actually looks surprisingly nice for coding and terminal.

For sans-serif, I use Mona Sans. For monospace, I use Monaspace. I think it’s a good-looking combination.

Ubuntu

Fantasque

Fira Sans / FiraGO by Mozilla, and the new SUSE font by SUSE.

Fira Code and Caskaydia Cove Nerd Font for monospace. For other uses, I’m usually good with whatever the system ships with.