TBH, I would prolly sub to 2-4 games at the time, if it was 9.99$ for a monthly sub with a 20%-40% discount for taking an annual or halfyear sub. All content included. Or buy to play content packs, maybe with ingame vanity rewards for pre-ordering upcomming DLCs. Any cash shop/microtransaction then better be in the form of out of game merchandice, tickets to real life special events, or vanity fluff that people with enough time can be ingame rewarded similar items for. I would rotate the actual playtime between games I know there are active friends on and games I have yet to explore quest chains, locations, achievements etc. on. I am too happy about different features for different game modes and char builds in different games to limit myself to one for long. I have not seen any game contain all of my favorite stuff in some sort of streamlined smooth way -- WoW is possible the closest, but they also had a long time to develope it.