Most travellers default to one or two styles — beach resort, city break, adventure, cultural immersion. Trying a deliberately different style every 2-3 trips often reveals genuinely new pleasures. The avoided category usually has more depth than the stereotype suggested.
What you might be missing
If you only do cities: try a quiet week in countryside. The recovery is different from anything cities offer. If you only do resorts: try an adventure trip. The accomplishment is different from pure relaxation. If you only do cultural immersion: try doing nothing for a week somewhere beautiful. The reset is real.
The avoidance often dates back to bad experiences
Most people avoid travel styles based on a specific bad experience years ago. The avoidance generalises beyond what the original experience justified. Trying again with better planning often reveals what's actually appealing about the category.
Next trip, try the category you've been avoiding. Often becomes the trip you remember most fondly.