Well, one of the top stories often involves Al Simmons' journey as Spawn. His transformation from a murdered CIA agent into a Hellspawn is a central and fascinating part of the series. It's full of his struggles against the forces of Hell and his attempts to hold on to his remaining humanity.
Comic book stores are great places too. The store owners or employees often know which Spawn stories are the best - selling and fan - favorites. They can give you recommendations based on your interests, whether you like more action - oriented or character - driven stories.
Spawn comics have indeed come to an end. The decision to end it might have been based on various factors such as creative direction, sales figures, or the story reaching a natural conclusion.
Well, it's hard to say for certain. You'd have to check the latest updates from the publishers or the creators to know for sure if Spawn comics are done or if there are more coming.