Bleach has it's pros and cons just like every other manga. It was the first manga I read so I grew attached to it and as the story progressed I picked up a few things:
Pros: It has it's unique art style, the characters don't are well designed and don't have a generic look like some other mangas I've read. Their personalities are also great and almost seem real.
It's not a dull series, it has a wide, well organised universe with a lot of content.
- The author didn't develop any deep romantic relationships in the series, thank God he didn't because that would have totally ruined it, there's just enough to leave people guessing.

Cons- I feel Ichigo's abilities were over hyped especially at the beginning when he defeated Byakya and Kenpachi, and also he keeps in getting new abilities out of nowhere, like the author thought Ichigo was too weak to survive in the world so he threw in a bunch of abilities e.g Ichigo is part human, quincy, hollow and shinigami. Sometimes it feels like the plot want properly planned.

Overall it's a great manga and I'd advise anyone to try it first and not get put off by the negative reviews/comments about it.