I actually wouldn't mind some more DC suggestions. At the moment I'm reading Batman, Batgirl, Detective Comics, Grayson, Gotham Academy, Superman and Multiversity. I stopped reading Wonder Woman after the creative team left. I read a whole bunch of Marvel stuff as I like the lighter tone of a lot of their comics, is there much in DC for someone like me? I only started getting into comics after New 52 anyway, so I'm not beholden to continuity or bothered about the reboots.
My suggestions for what you seem to like:
Batman and Robin (#1+ or #33+)
Batman / Superman (#1+ or #16+)
Superman / Wonder Woman (#1+)
Action Comics (#26+ Lana!)
Catwoman (#35+)
Justice League (#30+ Lex on the JL)
Justice League United (#1+)
Justice League 3000 (#1+)
Supergirl (#36+)
Batman and Robin is the second best Batman title. Tomasi is rock solid with Gleason on art. Either start at the beginning or pick up on the Batman Apokalips arc.
Batman / Superman has bounced between stuff in the past between the two or more recent pairings. The current "Superman's Joker" arc has really engaged me.
Superman / Wonder Woman: Sounds dumb right? It's actually not. It's been a great blend of these power characters exploring their relationship as well as big bads on their level. Gorgeous art.
Action Comics: Lana Lang as a semi regular has given this a delightfully fun silver age feel. Also, Baka is adorable.
Catwoman: A bit gritty but an amazing new take on Selina that I'm loving.
Justice League: Lex Luthor on the Justice League. It's great fun.
Justice League United: Same deal as Action Comics, except more in space.
Justice League 3000: I started off disliking the premise but it's really grown on me. The latest arc with Booster Gold and Blue Beetle has cemented my love for it.
Supergirl: Emanuela Lupacchino, my Goddess, on art. Space School for Super Powers. Maxima as an interesting character. A rocky history for this book but recently it's been really fun.