The zip-up hoodie.
By using the zipper as a line for a seam and a gauge for a neckline, you can make a top out of virtually any material without looking like you're wearing nurse's scrubs (not that there's anything wrong with those, they do look pretty comfy). The really cool thing about this clothing construction is that you can use the pattern in so many different ways.
In addition to the variety of fabrics, you can adjust the neckline length, go sleeveless or not, insert darts or a princess seam for a more fitted look or leave it long and loose as a tunic.
All you need are:
1. Enough fabric to fit your body size. A good way to measure this is to look at a pattern for a top you already have and see how much yardage is needed for that. I am a size 14 lady, and used 2 yards of fabric for the back piece and two front pieces, and 1 yard of fabric for the sleeves. Of course, it's better to have slightly more fabric than to have slightly less and end up with something uncomfortable and tight. You also need to allot enough material for hemming.
4. Fabric Marker
5. A sewing machine.
6. A tracing board, or just anything big enough to lay your hoodie flat across. A board is really helpful though because it has inches printed right on it.
7. (optional) additional embellishments, i.e. beads, sequins, lace, embroider, yoke, etc
Some basic sewing knowledge is needed, like how to attach a sleeve, clipping notches for a hemline and sewing raw edges to prevent fraying.