Characteristics of a flame

I did a search but didn't really come up with what I was looking for... I really did do a search.

Spending hours on here a day I have read allot about people flames being high and hot and this, that and the other thing. I guess my question is - What is a characteristics of a flame, a good flame. I saw a video posted by a member here where the flame was high, big and constant. My flames get high at times but then get lower and stay low then burst up for about 20 seconds or so then get low again. This happens with all Pellets I use. Some flames stay higher longer but none of them are constantly high and raging. Is this normal or do I need to give it more air or something? The stove seems hot and to be working correctly I just don't have a high constant flame for more than 20 - 30 seconds. It keeps coming back but never constantly high.

I have an Enviro Milan insert and it was in my sig... I put it there last time I got the lecture I guess I will put it there again and see what happens.

I do not have an OAK and the dealer set the air for me, told me that is where it should be. I do have a setting to set the Auger speed but the dealer who installed basically told me 99% of the time you do not need to touch that. He said don't touch.. unless your having issues.

The flame seems good, high to low to low to high. I was just curious if that's the norm or if it should always be high flame. I clean my stove everyday. Which kind of sucks but I have a very small ash pan, in hindsight I wish I knew that a big ash pan is kind of important. Live and learn I guess. There isn't much ash but after about 2 bags the ash is touching the burn pot.. but there is only about an inch from the burnpot to the ash pan floor and the ash pan floor is not that big. I assume you get the same evil with most inserts.