Your first strip, A Lame Introduction is a prime example of what I mean. Lots of needless exposition, no punchline. You could use your profile if you wanted to tell us that the strip is based on your life, but to be honest, I don't think it's important information. Introducing: Zack! is another one. There's some comedy in there -- the idea of avoiding sunlight, and I especially like the idea of making him African-American just because of Affirmative Action laws -- but the introduction doesn't have to be so dry and straightforward. "This is Zack. He's my friend. We talk online." You don't need to tell us that stuff -- just show it, and we'll figure things out. A Question: an interesting observation, I guess, but no real joke. What's the point?
I think the strips that you write that are actually part of the story, that tell jokes, are pretty good. I like your latest three, about the food court. I just don't like having to wade through punchline-less exposition to get there.
For an example of another ongoing series, see Scyess, who writes what is probably the longest-running serial strip on this site. Read his first dozen comics to see a number of recurring characters introduced seamlessly.
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The what mentioned above is total fiction. Please don't take it seriously!