Winter Starting Problems

The past few winters I've had issues with my 08 Frontier starting in cold temperatures in the AM. I ended up getting a better battery last winter that is for vehicles that use a lot of pull of the start and things have been pretty good. This am it was -22C (-7F), started the vehicle with the remote start. It didn't turn over the first time, but it tried again and it turned on.

I got into the truck and forgot to put the key in the ignition...crap. Put key in, turn it to start, it is firing, and sounds good and fast, but won't turn over. I try one more time before getting my booster to start it with my remote starter, and boom it starts.

Any idea as to why it starts no problem with my automatic starter vs they key? I'm also thinking maybe I need to get a block heater. It seems my truck doesn't really want to turn over as easily the past few winters. I had the truck checked for any electrical draw and things were normal, as well as the alternator.

thanks in advance, guys.