In the 5th ed army book it was said that Hochland was wealthy. Their halberdier in the example art had the most armour.
So I took that concept, and made my Hochland army very armoured. My handgunners are basically in plate armour - using briganza’s beseigers models. All my models have enough armour they should rules wise be heavy or plate instead of light.
Regarding getting bored - no. I used to play a lot during 6th and 7th ed. I needed appropriate unit sizes. I also needed enough models to make multiple smaller units (2 units of 15 greatswords were a favourite of mine during 7th and 8th edition). 40 - 50 halberds were a staple of 8th ed Empire armies. I didn’t start with the unit sizes being that though. I started with a workable 2000pt list, then increased as I adjusted the list while playing.
The amount I accumulated just kinda happened. I needed extra knight armoured arms, so bought more knight boxes. I wanted to run an all knight army. I wanted to run a gunline. I then settle on a style I like, and all those extra models form new armies.
Then as those armies form, I need a specific unit or 3 to make then themed or unique. And so on.
I attended 2 tournaments - ranked midrange, but second time I went with no wizards which was a surprise to most opponents as well as my numbers of troops.
Painting is less interesting to me than the modelling / conversions and armybuilding around a theme or background part of the hobby. I am still catching up in painting. Like I said, my Hochland and Marienburg (which I gave away) are my only mostly fully painted armies.