Ok,It´s really hard to pick just 5 titles but i´ll name a few that i enjoy. To make this more interesting, i´ll try to define each title in one word. In no special order:
1-Calvin and Hobbes (it is brilliant in so many ways. Bill Waterson captures a bit of everyone´s childhood with amazing artwork.One word to describe it:TIMELESS)
2-Preacher(if you like Tarantino-esque action with a gripping storyline and great characters, read all 66 issues.One word to describe it: FUN)
3-Watchmen(a very intersting storyline where Alan Moore deconstructs the super-hero genre. One word to describe it: CLEVER)
4-The Walking Dead (it´s an AMC hit for a reason, it has a tense narrative with great cliffhangers, where you feel that no character is safe. One word to describe it: ADDICTIVE)
5-The Stand(a great adaptation of one of Stephen King´s greatest masterpieces, it depicts a post-apocalyptic world where a group of survivors takes a stand against evil forces leaded by a mysterious man.One word to describe it: EPIC)