Dave -- Welcome to the forum and congrats on your purchase. You'll not be disappointed in your Cookshack purchase!
As Buckeye said, it depends on what you are smoking. Hickory is a little strong but personally I like it. I recently did a poll for smoking pork butts. The majority of people voting prefered pecan or apple wood over hickory, oak or cherry. Personally I don't think you can go wrong with pecan - not over-powering yet gives a distinctive smoke flavor.
It really does depend on what you are smoking. Chicken takes on smoke faster and easier than pork or beef so go light on whatever you use. IMO, it's easy to over-smoke beef too but not near as bad as chicken.
Start off light and add to suit your tastebuds. Remember, these are very efficient smokers and use little wood. When people say use 2-4 oz of wood take them seriously. Two oz of wood is about the size of a golfball.
Make sure to read
Lessons for new Users. There is a ton of good info there. Also read Smokin's 101s wherever they are
There are a lot of good people here who are more than willing to assist you in your smoking adventures. Come back often and ask questions. We're here to help!
Good luck!