Here are the comparative forms of the adjectives you listed:

1. small - smaller
2. expensive - more expensive
3. noisy - noisier
4. good - better
5. handsome - more handsome
6. ancient - more ancient
7. tall - taller
8. clever - cleverer (or more clever)
9. cheap - cheaper
10. far - farther (or further)
11. big - bigger
12. pretty - prettier
13. bad - worse
14. attractive - more attractive
15. close - closer
16. crowded - more crowded
17. quiet - quieter
18. peaceful - more peaceful
19. dangerous - more dangerous
20. boring - more boring
21. fun - more fun
22. much - more (commonly used as "more" in comparisons)
23. little - less
24. wide - wider
25. narrow - narrower
26. difficult - more difficult
27. simple - simpler
28. fat - fatter
29. sad - sadder
30. important - more important

If you have any further questions, feel free to ask!