If you liked the Bleach anime, the Anime-Planet community thinks you'd like:
Kiba is a wolf, one of the last of his kind, and his dream is to find Paradise in a world torn asunder by war. Cheza, the legendary Flower Girl, can lead him to Paradise, but there are others who desire her, and help from other wolves at his side may not be enough. Driven by his noble spirit, he will not forsake his quest.
Both Bleach and Wolf's Rain are about action and character development - not just a journey from one point to the next, like some anime's, but also a journey of the characters. Both series can have both dark and light atmospheres, generally due to the plot and presentation of the anime style. I myself liked how both shows are about understanding; in Bleach, we have Ichigo - a "Substitute Shinigami" - who, in most cases, defies the laws of Soul Society and due to his 'illegal' powers (illegal due to a transfer of power with Rukia) is always fought against as he tries to make himself understood to others as doing the right thing. Similarily, in Wolf's Rain, we see a pack of wolves who are also seen as outsiders, and they are trying to find 'Paradise' despite being hunted and looked down upon. Both series also have a huge array of characters and the persona's they all bring to the table - if you like the heroic warrior dude, he's there. If you like the arrogant always-wanna-fight character, he's there. Damsel in distress? She's there. If you love mystery and intelligent -yet at the same time, immersive- plots (along with a few occasional twists) then these two are the ones they are for you. But on a final note, despite having this seemingly serious outlook on story of these two, they both have their own charm and funny wit in each series.
A year has passed since Jean Grey met her tragic demise, and the X-Men and Xavier Institute have yet to recover. Things change when Charles Xavier calls the disbanded mutant team back together, sending them to Japan to help find a missing girl named Hisako. But when they arrive abroad the team discovers that things are far worse than they expected: a shadowy group is abducting mutants, bringing them to secret laboratories, and an insidious, potentially fatal secondary mutation called the Damon-Hall Syndrome is spreading. Together, the X-Men must discover the truth behind these events and put a stop to the violence against mutants.
X-men is basically an American shounen action series. X-men is aimed at the exact same demographic as shounen action and shounen action shows are always about a group of people with superhuman powers (Soul Reaper/Shinigami) similar to X-men. So if you like shounen action anime or X-men you should check out the other.