Shadowhawk gets a lot better after the first series, I like the first series, because I am a fan boy and Shadowhawk was part of my child hood, but even I will tell you that the first series (Shadowhawk #1 to the monster within Shadowhawk #18) can be pretty corny and embarrassing at times. But "The New Shadowhawk" story line is much much better, the writers do a great job adding depth and background, and over all they completely revolutionize Shadowhawk. after that you have "ShadowHunt" and then Eddie Collins becomes Shadowhawk, and after that series is "Shadowhawk Resurrection" All of which are good. plus Shadowhawk is in a ton of crossovers, but the only other issue I would really suggest you read "Shadowhawks of legend"
Anyway, to make a long answer short, Shadowhawk is a great series if you give it a chance. He isn't my favorite, but he is in my top 10.