Very minor thing, but the default theme’s popup animation is a bit too aggro for my liking, so I found a solution[1] using a bit of custom CSS to suppress that:
/* source: https://github.com/empirefx/obsidian-disable-animations/blob/master/styles.css#L14 */
.menu,
.tooltip {
animation: unset !important;
transition: var(--anim-duration-none) !important;
}
Save this to .obsidian/snippets/suppress-tooltip-animation.css within your vault(s) and enable using Settings → Appearance → CSS snippets (slide the toggle).
Hope this helps!
1 github[dot]com/empirefx/obsidian-disable-animations/blob/master/styles.css#L14