I've said before, I prefer ATS over ETS2 because it just seems a little more polished. It shouldn't, they're both the same product really.
In ETS2, I have Pro-Mods installed and I own an absolutely stupid number of garages and drivers with enough income that every twenty four hours, I could buy a new garage, max out the number of slots and fill it up with lorries and drivers. That gets boring after a while and is largely down to Pro-Mods. It's also stupidly out of date and I doubt it'd even load now.
In ATS, I only have the base maps (with all the DLC) and the only mods I've got loaded are for real-world companies, for realistic headlights, improved sounds and the Jazzycat traffic ones. They're all updated through the Steam workshop except the Jazzycat stuff so I should never have any issues.
I started a new company when I grabbed all the new DLC at the beginning of the month and am having fun building it up from scratch again. I've only got the one garage and two drivers working for me but am nearly ready to expand my garage to five slots although I can't fill them yet).
I haven't done any tweaks to my own truck yet, just driving a base Kenworth T680.
I find this is actually good therapy for my broken arm, I can keep my right arm on the top of the steering wheel and it's exercising it to steer.
Also, it makes me chuckle when I pick up a load for the company I used to work for, years ago!