Avatar Wan's story is really interesting. He was the first Avatar. In a world where the spirits and humans were more separated than ever, Wan was a bit of an outcast among humans. He learned to live among the spirits in the Spirit World, which was a very unusual thing at that time. Through his adventures there, he gained the ability to bend all four elements and became the first Avatar, uniting the human and spirit worlds in a way that had not been done before.
Avatar Wan started as an outcast among humans. He entered the Spirit World, befriended spirits, mastered bending, and with Raava, became the Avatar, bridging the human - spirit divide.
Yes, there are likely some popular ones. Often, these fanfictions gain popularity because they explore the relationship between Mako and Korra in a way that the original show might not have fully delved into. For example, some might focus on the emotional build - up to the kiss, which can be really engaging for fans who are invested in their relationship.
The Legend of Korra comics are definitely worth a read. They capture the essence of the franchise and bring fresh perspectives. The quality of the storytelling and the visuals make them a great addition to the series.
The 'lemon' aspect might be a bit hard to come by in a clean way as it often involves inappropriate content. But for normal Korra and Mako fanfictions, you could also try FanFiction.net. Some stories there might show their relationship developing, their adventures together, and how they support each other, which can be really interesting to read.
Ichigo's Soul Reaper powers are based on spiritual energy, and Korra's bending is based on her connection to the elements. Their powers could interact in a way that creates a new form of energy. For example, when Ichigo uses his Getsuga Tenshou near Korra while she's bending, it might create a shockwave that combines the force of the spiritual energy blast with the element she's bending. This could be a very powerful and unique combination that they could use to defeat enemies.