I would say I am more of a character/ story guy, as long as the art is decent. I like stories to be a little more serious.

If that's the case, Torgo, then be careful about some of the earlier recommendations in this thread.

Avoid Silver Age JLA like the plague if you're looking for "decent art and serious stories". Mike Sekowsky is a highly-stylized artist, and Gardner Fox tends to deliver formulaic and predictable scripts, which can be nostalgic fun if you first read the stories as a kid, but are tedious if you're discovering them as an alleged adult.

Legion Of Super-Heroes is hit-and-miss. The first 3 or 4 Archive volumes are, like the JLA, fun for nostalgic purposes, but laughable if you're coming to them looking for adult-level story and art. About midway through the run, a pre-adolescent Jim Shooter injects some fun, and a little later on artwork by an young Mike Grell also stirs things up.

Silver Age Teen Titans should be the very last on your list, as it consists of men in their late 40s and early 50s trying to emulate the "hip youth" culture of the mid-1960s, and missing by a mile.

Bronze Age Teen Titans are a different kettle of ghoti, though. Highly recommended.

Aquaman does, indeed, display pretty good artwork by Fradon and Cardy. The stories are OK but nothing special.

Doom Patrol is highly recommended. Hawkman, Atom, and Adam Strange are almost as good. Hawkman, in particular, has held up well over the years.

Silver Age Superman titles -- Man Of Tomorrow and Supergirl -- are dull but for the nostalgia value. Silver Age Batman -- the two volumes of "Dynamic Duo" Archives -- is pretty good.

If, as a Marvel fan, you're also a fan of Jack Kirby, you'll definitely want the two Kirby Archive series, Challengers Of The Unknown and Kamandi, each with two volumes. If a fan of Steve Ditko, pick up Action Heroes Archives Vol. 2, featuring Ditko's work on the Charlton heroes of the mid-sixties (Captain Atom, Blue Beetle, and The Question). You can pretty much avoid Action Heroes Vol. 1, which is all Captain Atom from Ditko's pre-Spider-Man period (1960-1962).

If you want to decide for yourself how much you like things like JLA, LOSH or 60s Teen Titans, shell out fifteen bucks for a Showcase or two.