Drop earrings used to mean one thing: a wedding guest reaching for the only pair of good jewellery she owned, usually gold plated, usually heavier than it looked, with a clasp that caught in her hair by nine o'clock. That's changed properly in the last few years. The lightweight ones have got genuinely light, the designs have got more interesting than a single teardrop shape, and you can now find a pair you'd wear on a Tuesday as easily as to something dressed up. That shift is for the better. Earrings stopped being occasion only and started being something you actually reach for.
Once you've got a pair that doesn't feel like a special event, they start earning a spot in the ordinary rotation. A drop earring does most of its work against a plain neckline, a crew neck jumper, a shirt with the top button open, because the shape needs room to actually move and show itself rather than fighting with a scarf or a high collar. Hair up or hair tucked behind the ears makes more difference than the earring itself, honestly, since half the point is the length being visible. Where the good ones separate from the disappointing ones is in the metal and the fittings, not the design on the front. A proper plating or solid metal keeps its colour after a few months of daily wear, where a thin wash goes patchy and a bit green at the back within weeks. The hinge or jump ring at the top should feel tight, not loose and clicky, because that's the part that's taking the strain every time you put a jumper on over your head. Hooks matter too, a cheap one bends out of shape the first time it catches on a scarf, and then it never sits right again.
If you've got nothing in this shape yet, start with something small and simple, a slim bar or a narrow hoop dropping into a single stone or shape, nothing with multiple tiers or dangling charms that'll tangle in a bag. That one pair will do more days than you'd expect, through an ordinary working week and into an evening without needing to change. They suit autumn and winter especially well, when necklines get higher and plainer and an earring becomes the only jewellery doing anything, but a good pair in a lighter metal works just as well against bare shoulders in summer.
For a first pair, I'd go for a warm gold tone over silver. It sits better against most skin tones and doesn't show tarnish the way silver does after a few weeks of being left on a bathroom shelf.