My favorite is Sluggy Freelance
Sluggy Freelance is a popular, long-running daily webcomic written and drawn by Pete Abrams. The comic has over 100,000 daily readers and premiered on August 25, 1997. Abrams is one of the few, and first, webcomic creators successful enough to make a living as an artist.
While the strip began as a gag-based series in which the three main protagonists (Torg, Riff and Zoë) would stumble from one brief, bizarre, parody-centric adventure to the next, the characters and plotlines have gradually become longer and more serious. However, even the more dramatic and soap operatic story arcs often conform to the common gag comic strip format. While there is often sexual innuendo and cartoon violence, the comic contains little strong profanity and no explicit nudity.
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I like it because the drawings are unique,and the storyline is deep and can be hilarious sometimes.Also because it has robots,witches,demons from another dimension,human-cyborgs,satanic kittens,aliens,ghosts,horrible puns,and many more.