2001 Dodge Ram Engine Idles rough

As it continues to get colder, I notice these issues more & more. If my engine is really cold, it idles extremely rough, to the point of jerking like its running out of gas, but if I gun it it runs fine. The entire front end will shake as it idles at a stop, then hesitates as gas is given when I take off.

I had the codes checked and it showed that there were some misfires. I had Bosch plugs in there that I had just installed 3 mos ago but was told by a mechanic that Bosch doesn't work very well in Dodge and suggested Champion, which is what I did last week. Still having the problems. This rough idle is guzzling all my gas. Any suggestions as to what it might be.
Thx