I recommend taking a look at the work of Shaun Tan, Sybil Andrews and Richard Bawden, very different styles but fantastic stuff.
I have fallen in love with the work of Frans Masereel since being given a copy of his book The Sun, The Idea and Story Without Words.
Etchings are also appealing (only partly so that I can invite people to ‘come up and see my etchings’) and plan to try it despite friends and colleagues expressing concerns about my having access to an acid bath.