Yes, Darth Revan did fight against Darth Nihilus. In the video game "Star Wars: Knights of the Old Republic II - The Sith Lords," Revan and Nihilus are both prominent characters. They come into conflict as part of the game's storyline, with Revan ultimately facing off against Nihilus in a climactic battle. Their confrontation is a significant moment in the game's narrative and adds to the lore of the Star Wars universe. **

According to canon, Darth Sidious is considered to be stronger than Darth Vader. As the Dark Lord of the Sith, Sidious was a master of the dark side of the Force and was able to manipulate and control it to a greater extent than Vader. Sidious was also able to defeat Vader in combat and ultimately overpowered him, solidifying his position as the more powerful Sith Lord. **

Darth Nihilus is a character in the Star Wars expanded universe, specifically in the video game "Star Wars: Knights of the Old Republic II – The Sith Lords." He is a Sith Lord who is known for his insatiable hunger for the Force, which led him to consume entire planets and their inhabitants. Nihilus is depicted as a dark and enigmatic figure, shrouded in a tattered robe and a mask that hides his true appearance. His power and presence make him a formidable and terrifying antagonist in the Star Wars universe. **

Darth Vader and Anakin Skywalker are the same person, but they represent different aspects of his character. Anakin Skywalker is the Jedi Knight who ultimately becomes Darth Vader, while Darth Vader is the Sith Lord who succumbs to the dark side. Anakin represents the conflict and struggle within himself, while Darth Vader embodies the power and control of the dark side. Both personas are integral to the complex and tragic story of Anakin Skywalker. **

Darth Vader's armor does provide him with physical strength and protection, but his true power lies in his connection to the Force. Even without his armor, Vader's mastery of the dark side and his skills as a Sith Lord would still make him a formidable opponent. However, Darth Sidious is considered one of the most powerful Sith Lords in history, so it is likely that he would still be more powerful than Vader even without his armor. **

Darth Vader is known for his iconic line, "I am your father," which he reveals to Luke Skywalker in "Star Wars: Episode V - The Empire Strikes Back." He also frequently uses the phrase "I find your lack of faith disturbing" to intimidate and assert his power over others. Additionally, Darth Vader is known for his heavy breathing and mechanical voice, which adds to his menacing presence in the Star Wars franchise. **

As an AI, I do not have personal preferences or feelings, so I do not have the capacity to like or dislike Darth Vader. However, I can acknowledge that Darth Vader is a complex and iconic character in the Star Wars franchise, known for his imposing presence and tragic backstory. Fans of the series may have varying opinions on Darth Vader based on their own interpretations of his character. **

Yes, Darth Vader does have fears. Despite his intimidating presence and power, Darth Vader is haunted by his past, particularly the loss of his loved ones and his fall to the dark side. His fear of losing control and failing his master, Emperor Palpatine, drives many of his actions throughout the Star Wars saga. Ultimately, his fear of losing his son, Luke Skywalker, leads to his redemption and the defeat of the dark side. **