When stopped, engine idle and warmed up, the car idles with enough wobble to jiggle the car. It is noticeably stronger in gear but still present in neutral and park.
Doesn't do it when cold, and doesn't seem to do it when hot. But now that outside temps have dropped into the mid 60's, the motor doesn't get to the halfway mark on the temp gauge anymore. On the morning commute when traffic is less and I can wind up the motor a bit, the problem is almost nonexistent. But the commute home, with lots of idle time, most travel at less than 30 mph, with no max speed over 60 for more than a minute, it gets real noticeable on the last mile home.
Feels like an aggressively cammed small block out of a redneck's Camaro. Or an American V-twin

No sign of this when any throttle at all is applied. Motor hasn't at idle but feels like it's almost hitting that point like it's idling too low.
Car takes a bit longer to start in the morning as well.
Already had the oil screens for the variable valve and turbo checked.
Engine throws no codes, nothing showing up in my code scanner.
I figure it's time for new plug wires and plugs, but this is gonna have to wait as I'm driving out of state in a couple days.
This new behavior isn't symptomatic of something serious that I have to address before racking up 1500 miles over the next week and a half, I hope?