Share some webcomics you read! My own recs (the first that came to mind anyway):

Cucumber Quest
Agents of the Realm
Helvetica
Monster Pop
Delilah Dirk
Em Carrol
Manly Guys Doing Manly Things
Lackadaisy
Question Duck
Happletea
Thea Mania Comics
Ava's Demon
Roza
Nimona
Hark! A Vagrant
Sfeer Theory

I read entirely too many comics, but some of my current and enduring favourites (in alphabetical order) include:
The Adventures of Dr McNinja - a doctor who is also a ninja, and his weird and wonderful adventures
Darths and Droids - if Star Wars was a D&D campaign
Existential Comics - featuring a cast of different philosophers
The Order of the Stick - epic, hilarious D&D stick figure comic
Saturday Morning Breakfast Cereal - y'know, SMBC.
Subnormality - poignant comics with a lot of words in
xkcd - y'know, xkcd. (Also, xkcd's What If?)

Oooh, I love Lackadaisy Speakeasy!

Does the stuff from The Oatmeal count?

Also- Blood Stain, hilarious comic about a the new assistant of a mad scientist