Gateron Melodic

It is a genuine clicky switch, so it makes noise, but the click is on the softer and more refined side compared to box-style clickers like MX Blue or Box Jade. It is audible without being piercing, which makes it a reasonable choice if you want a click that won't dominate a shared room.

No. It ships factory lubed and feels smooth out of the box. Hand-lubing a click-leaf switch is risky anyway, since lube on the click mechanism can mute or kill the click, so most people should leave the stem and leaf alone.

It is clicky, driven by a click leaf, but it reads as more tactile than most clicky switches. The bump is noticeable and present rather than a sharp spike, so it lands somewhere between a typical clicker and a strong tactile.