I played 1st edition 40K using the Compendium and Compilation booklets. I played 2nd edition. I stopped with the release of 3rd edition as I saw it as an abomination. I started again with 5th edition when I couldn't find any other similiar game, and after trying unsuccessfully to develop my own ruleset. The rulebook for 5th edition has minor flaws in play which I hope will be corrected in 6th edition. However, I suspect that 6th edition will focus on a game change rather than corrections, but nowhere as radical as the game change from 2nd edition to 3rd edition.
Why do I continue with 40K now? I have a glimmer of hope that I can find other players that are of the same attitude towards the game as myself. I want the competition in a 40K game, but I do not want the domination in a 40K game. Regrettably, for product sales, GW rigs the game for domination.
As one plays 40K, one may have an enthusiasm crash because 40K, and/or its community, is not providing what one wants in a game. What to do? Stop? Sell? Hibernate? Myself, I have decided to build non-domination armies on a theme. Of course, it's tricky at times to determine if a model/unit from a codex provides competition or provides domination, as sometimes it depends on the other components in the army.
Generally, I see Unique and Special Characters as domination units. Knight Commander Pask from the IG codex is an example to me of an Unique upgrade character that is not a domination unit. Inquisitor Coteaz from the GK codex is an example to me of a Special Character that is not a domination unit depending on the composition of the Inquisitional Henchmen units which were made Troop choices by the inclusion of Inquisitor Coteaz.
Vehicles? Monstrous Creatures? One, maybe two. In my view, 40K has become kithammer with the vehicle kits and the monster kits as the other units of domination. Whereas not including Unique and Special Characters is a simplistic means to define a non-domination game involving these units, Vehicles and Monstrous Creatures require a different solution, that is, limiting them through self-restraint. I see this limitation through self-restraint as an art, and not a science. I would have to be knowledgeable with a codex to provide a good assessment about whether an army list is for domination or non-domination play when including Vehicles and Monstrous Creatures.
Once one discards Unique and Special Characters, and limits Vehicles and Monstrous Creatures through self-restraint, one has an abundance of points to spend on Troops, and the pressure to play high-point games subsides.
I have no problem with a 40Ker liking and wanting to play using domination and/or high-point games (and with little terrain), but that's not for me.