We go every which-a-way!
Arrival day (meaning we're not getting there until mid-afternoon): TO THE LEFT! Adventureland, Frontierland and Haunted Mansion (FP+ for BTMRR, Splash and Pirates, with 4th at Jungle Cruise on our way out).
Day 2 (rope drop arrival, morning): TO THE BACK! Fantasyland (starting with Peter Pan, Pooh, Dumbo and continuing around the land counterclockwise, with FP+ for 7DMT and Enchanted Tales with Belle, capped off by lunch at BOG). Then, after a lengthy nap break back at the hotel, we return to the park and head TO THE RIGHT! for Tomorrowland (with FP+ for Buzz and/or Space Mountain).
We return to MK later for at least one more day (generally starting TO THE LEFT, which has a higher concentration of our favorite attractions that see short waits just after rope drop) to revisit favorite attractions and then, later in the morning, visit "anytime" attractions we might have skipped (e.g., Hall of Presidents, Tom Sawyer Island, Philharmagic).