Understand, I did the same when I started out. Now I have evolved to a two pellet strategy, with three options.
Smokin Pecan Shell Pellets & Royal Oak Charcoal Pellets. The only two brands I use.
Here is the strategy:
180 - 275 degrees = Smokin Pecan Shell Pellets
300 - 450 degrees = 50/50 Blend
450 - 600 degrees = Royal Oak Charcoal Pellets
Here is the why:
The Smokin Pecan Shell Pellets are by far the best pellet for low & slow smoking. The pellets are made from shells of pecans, not from wood. They have a much higher lignin content, burn longer than wood pellets, and way better moisture resistance. The ash is also non existent.
The Royal Oak Charcoal Pellets are great for grilling. They also burn longer than wood pellets, smoke more at higher temperatures than wood pellets, and are extremely moisture resistant compared to wood pellets. Plus if you are using Manual Mode at the higher numbers you definitely want to use them.
The 50/50 blend is used the most for me. I cook more chicken, brats, dogs, hamburgers, pork tenderloins, frozen pizzas, salmon, etc. than I do smoking brisket, pork shoulder, and ribs, or searing steaks. So the 50/50 blend stays in my hopper most of the time. And since the Pecan Shell Pellets produce the most smoke at lower temperatures & the charcoal pellets produce the most smoke at higher temperatures, you get the best of both worlds with temperatures between 275 - 450 degrees