I've been wandering myself. Personally I think the Naruto and its 'verse are rather ideal settings for fanfiction whereas Bleach is much less so. I'm not sure where the difference comes from but I feel I could come up with a lot more fanfic ideas for Naruto than I could for Bleach. Though I think interest in fanfiction has declined recently in general.
Anyway, did some looking around and found these:
The First Guardian
What if Kurosaki Ichigo was a lot more curious as a child? What if this led to him having an inquisitive mind? Just how much would this change the course of history? Let's find out, shall we? - Slightly AU. Rated M for sexual content and my dirty mouth.
Rated: Fiction M - English - Romance/Humor - Ichigo K. & Rukia K. - Chapters: 12 - Words: 89,555 - Reviews: 502 - Favs: 1,079 - Follows: 1,047 - Updated: 04-24-12 - Published: 10-16-11
Downfall
In an alternate universe, three traitors have set into motion a plot that will shake the world to its core. Captain Sosuke Aizen and the Thirteen Court Guard Squads stand against Hueco Mundo, awaiting an enemy with genocide as its goal.
Rated: Fiction T - English - Adventure/Drama - S. Aizen - Chapters: 28 - Words: 142,309 - Reviews: 225 - Favs: 240 - Follows: 232 - Updated: 03-03-12 - Published: 09-08-10
Anabiosis
Because not all reunions are easy. Ichigo and Rukia have a conversation, and broken edges are smoothed down again.
Rated: Fiction K - English - Romance - Ichigo K. & Rukia K. - Words: 2,234 - Reviews: 25 - Favs: 88 - Follows: 10 - Published: 02-28-12 - Status: Complete
Shattered Realms
Aizen's defeat has left a tense peace between Arrancars and Soul Reapers. The resulting isolation has lasted for 200 years, only to be broken by a covert expedition from the Soul Society that has vanished. A small group is sent out to find out what happened only to find themselves facing the affects of the past while old heroes struggle w/their own pasts. Written w/Eduard Kassel
Rated: Fiction M - English - Drama/Adventure - Ichigo K. & Rukia K. - Chapters: 11 - Words: 242,041 - Reviews: 65 - Favs: 56 - Follows: 57 - Updated: 04-20-13 - Published: 10-13-11
Not Quite As Planned
Ichigo was a bit slow to pull Zangetsu out as his Inner World crumbled. The result ends up not quite as Urahara had intended.
Rated: Fiction M - English - Adventure - Ichigo K. - Chapters: 23 - Words: 61,753 - Reviews: 629 - Favs: 1,227 - Follows: 722 - Updated: 06-13-12 - Published: 10-13-11 - Status: Complete
The Protector's Temptation
On the eve of his 17th birthday, a powerless Ichigo is given a chance to regain his powers once again, but with a completely different twist. AU from after the Winter War. Chapter 21 Revised. Please check the note for more details.
Rated: Fiction M - English - Adventure/Supernatural - Ichigo K. & Kyoka Suigetsu - Chapters: 23 - Words: 98,018 - Reviews: 1,012 - Favs: 1,185 - Follows: 1,111 - Updated: 05-09-13 - Published: 07-16-12