I love to use Cursed Items, I put them to two basic catagories, Flawed and True Cursed.
Flawed items are simply items that had something go wrong during their construction. A remove Curse doesn't usually work with these items since they techincally are not cursed. It might be possible for a high level Artificer to "fix" them thought. They can fall into several catgories.
Charged: This is an item that is normally not charged, like a Flaming Sword. It is a great way to give a more powerful item to a lower level PC.
Fatal Flaw: The item is extremely vulnerable to a specific material, energy or creature. When it contacts it, bu-bye.
Transformational: This item grants is abilities by transforming the user into a form with that power. A Displacemnt Cloak that turns you into a Displacer Beast.
Quriky: These item just have one or more little quirks about them. A potion that tastes terrible, a ring that falls off a midnight or a sword that always glows.
Costly: This items requires a sacrifice to use or recharge it. You might have to burn a spell slot or sharpen the axe every night.
Focused: This item is not actually cursed, but it was created for such a specific purpose that used any other way it appears to be cursed. A Druid's pouch that turn gold into mistletoe, or a Ring of Infernos that allows you to survive on the Plane of Fire, but traps you in a block of Ice anywhere else.
Firewall: For these items the curse is just a way to keep others from using it. When used by anyone not of the chosen Race, Class or Alignment, the curse becomes active. An Elven Spear could be a Backbiter when weilded by any non-elf.
True Cursed Items were made to be cursed. Sometimes the curse can be removed or mastered, but if these items are used by an Artificer to Retain Essece, the curse may be transfered as well. They fall into these catagories;
Post Cursed: This is a normal magic item with a curse placed on it. They can have their curse removed.
Chaos Item: These were crafted to manifest Chaos in the world. They have a tendancy to be lost after they function, only to be found again by someone else. The Rings of Eris are a good example, Djinni Rings that grant three wishes, the three wishes of the last person to use the ring, the next person get's your wishes.
Counter Item: These items were created to be used as weapons. Leave them in an enemy land, give them to an enemy family or disrupt a rival church or wizard's school.
Corruption: These items were made to corrupt mere mortals to evil. The Coins of Sin, Seven coins that can grant a wish each, if that wish is based off a particual one of the Seven deadly sins.
Contagious Curse: These items not only retain their curse, but spread it like a plague. Another tactical weapon or divine focus item.
Damned: If you ever watched the Friday the 13th TV series you know what these are. These Items are cursed with a Divine curse and are very powerful and dangerous.