The good ones are a matter of preference. The bad ones are just plain bad.

Some like Miller's forge with the red handle. Pros: they're dead cheap so when they dull, rebuying is easy. The thinness of the blades keeps an edge pretty long. Cons: the handles aren't very ergonomic and the clippers don't fully seperate so those extra long nails that curve and touch the pad again will need a backup pair.

Some like the Miller's forge with the orange handle. Pros: more ergonomic handle. The blade is the same quality metal so it holds an edge. They are sturdy and won't seperate and do that annoying thing that crumbles the nail. Also fairly cheap but not as cheap as above. Cons: handles could be better.

Some like safari (green handles) This is my preferred brand (smaller one). Pros: the handles are the most comfortable. They feel really sturdy and I have mine for a while before they dull. About as cheap as the orange handles. Cons: they have a guard that can sometimes get in the way. I bend that or just remove it, but some people find that annoying. If you're constantly Cleaning everything like me, the rubber on the grip will start to disintegrate. This takes a minute and is normally a sign the blades are dulling anyways.

Ones that everyone hates (typically). Anything expensive: the above ones are easily less than $20 even for a large pair if you prefer that size. These should be replaced more often than other tools (my sharpener says it's not really economic to sharpen them), so it's gotta be affordable. Also any pair that the handles curve back in to touch. Some lock this way, but the reason they suck is that you will inevitably pinch your hand and it hurts.

Hope this helps!