Wanna get into comics

For Batman, read the Grant Morrison saga (Batman and Son, the Black Glove, Resurrection of Ra's Al Ghul, Batman RIP, Final Crisis, and the Return of Bruce Wayne)

For Marvel, that is a broad question. There are many characters in Marvel.

Frank Miller's Batman series rocked. I'm not a big Batman fan though.

As for Marvel comics, you can buy the $20 collection ones that have part of a series together, these will get you started on different characters and you won't have to spend a TON of money to find out you like/dislike them.

As for who with marvel Spiderman and stuff are popular because people love the stories and the characters, so you for the most part can't go wrong if you are choosing a mainstream character to find something you like, but it is all up to personal preference bud, you just have to try the waters. Good luck though, I know comics and manga are a great source of entertainment and hopefully you find your niche. :)

If you're going to get into Batman, keep a look out for basically anything written by Grant Morrison. "Hush" was quite good as well. If you're planning on reading anything else by DC Comics, check out "52" it's one of DC's best events. It focuses on the "B-list" heroes of the DC universe. (It follows the story of a world without the big three, Superman, Wonder Woman and Batman, who "disappear" during "Infinite Crisis")

As for Marvel, check out Civil War, it's concept was interesting, but I personally believe it fell short on presentation. It's still definitely worth a read through, though. Check out Deadpool as well, he's a fun little character (the stuff written by Joe Kelly made the character, however so make sure you read those.)

I personally believe that if you have any sort of information on a character, then you can instantly pick up on what's happening. If you know Spider-Man was bitten by a radio active spider, than you're set to pick up any copy of Spider-Man at your local comic book store. (Of course, the Internet is always there to help you if you don't understand right away.)

And please, make an effort to read some indie comics. Stuff like Joe Kelly's "I Kill Giants" and James Stokoe's "Orc Stain" are fantastic and beautiful.