It's really simple. If you don't give a shit about anything then buy whatever looks good.
If you give a shit about things, then think light. Research unsprung weight. Items that have to rotate rob a lot more HP than people think. Heavy wheels kill your available HP.
Also, tall skinny tires are the way to go, unless you are looking to do something very specific and need wide tires.
I have read many scientific articles on tires, and wider tires, in most off road situations, actually give you less traction, where as taller tires give you more traction, plus they give you more ground clearance, and are lighter, giving you better overall performance.
On a perfectly flat surface, a wider tire does not give one single advantage in traction. They use wider tires on race cars because of heat distribution, height to weight rations (keep the tires from toppling and coming off the rim, etc...).
Tall, skinny tires on a lightweight rim.
Unless you want to be like my brother and his friends and get the fucking widest tire possible so your truck looks all cool with a pit bull stance, and replace your PS pump, etc... every other fucking day, and never, not even one fucking time, take your truck through anything that would even warrant the use of 4 wheel drive.
Oh yeah, if you are going to be mainly driving off road, then sure, get biased tires. However, if you are going to be driving your truck as transportation on pavement, then don't be a fool, get radials.
I know so many people who get swampers, etc... and even after having them balanced and aligned almost daily, the tires wear weird and start riding very not smooth on the road. Get radials.
