Latest version of my "small patchwork" world generation.  This produces small (65x65) maps with about 1800 +/- 100 different regions.  That will give high odds that you can fit 2-4 different biomes into the same embark area and will provide a lot of variety.

[WORLD_GEN]
[TITLE:SMALL PATCHWORK]
[DIM:65:65]
[EMBARK_POINTS:1324]
[END_YEAR:400]
[BEAST_END_YEAR:200:100]
[REVEAL_ALL_HISTORY:0]
[CULL_HISTORICAL_FIGURES:1]
[ELEVATION:1:400:500:500]
[RAINFALL:0:100:3200:3200]
[TEMPERATURE:25:75:200:500]
[DRAINAGE:0:100:1600:1600]
[VOLCANISM:0:100:950:950]
[SAVAGERY:0:100:750:750]
[ELEVATION_FREQUENCY:5:20:40:60:80:30]
[RAIN_FREQUENCY:4:10:20:60:80:120]
[DRAINAGE_FREQUENCY:4:40:40:40:40:40]
[TEMPERATURE_FREQUENCY:4:10:60:120:60:10]
[SAVAGERY_FREQUENCY:4:20:20:20:10:10]
[VOLCANISM_FREQUENCY:4:10:20:60:80:100]
[POLE:NORTH_AND_OR_SOUTH]
[MINERAL_SCARCITY:1000]
[MEGABEAST_CAP:10]
[SEMIMEGABEAST_CAP:50]
[TITAN_NUMBER:10]
[TITAN_ATTACK_TRIGGER:100:250000:2000000]
[DEMON_NUMBER:22]
[NIGHT_TROLL_NUMBER:11]
[BOGEYMAN_NUMBER:11]
[VAMPIRE_NUMBER:11]
[WEREBEAST_NUMBER:11]
[SECRET_NUMBER:22]
[REGIONAL_INTERACTION_NUMBER:22]
[DISTURBANCE_INTERACTION_NUMBER:22]
[EVIL_CLOUD_NUMBER:11]
[EVIL_RAIN_NUMBER:11]
[GENERATE_DIVINE_MATERIALS:1]
[GOOD_SQ_COUNTS:5:17:31]
[EVIL_SQ_COUNTS:5:17:31]
[PEAK_NUMBER_MIN:1]
[PARTIAL_OCEAN_EDGE_MIN:0]
[COMPLETE_OCEAN_EDGE_MIN:0]
[VOLCANO_MIN:1]
[REGION_COUNTS:SWAMP:30:0:0]
[REGION_COUNTS:DESERT:30:0:0]
[REGION_COUNTS:FOREST:100:0:0]
[REGION_COUNTS:MOUNTAINS:400:0:0]
[REGION_COUNTS:OCEAN:50:0:0]
[REGION_COUNTS:GLACIER:0:0:0]
[REGION_COUNTS:TUNDRA:0:0:0]
[REGION_COUNTS:GRASSLAND:100:0:0]
[REGION_COUNTS:HILLS:100:0:0]
[EROSION_CYCLE_COUNT:200]
[RIVER_MINS:25:25]
[PERIODICALLY_ERODE_EXTREMES:1]
[OROGRAPHIC_PRECIPITATION:1]
[SUBREGION_MAX:5000]
[CAVERN_LAYER_COUNT:3]
[CAVERN_LAYER_OPENNESS_MIN:20]
[CAVERN_LAYER_OPENNESS_MAX:80]
[CAVERN_LAYER_PASSAGE_DENSITY_MIN:20]
[CAVERN_LAYER_PASSAGE_DENSITY_MAX:80]
[CAVERN_LAYER_WATER_MIN:0]
[CAVERN_LAYER_WATER_MAX:100]
[HAVE_BOTTOM_LAYER_1:1]
[HAVE_BOTTOM_LAYER_2:1]
[LEVELS_ABOVE_GROUND:15]
[LEVELS_ABOVE_LAYER_1:5]
[LEVELS_ABOVE_LAYER_2:1]
[LEVELS_ABOVE_LAYER_3:1]
[LEVELS_ABOVE_LAYER_4:1]
[LEVELS_ABOVE_LAYER_5:2]
[LEVELS_AT_BOTTOM:1]
[CAVE_MIN_SIZE:5]
[CAVE_MAX_SIZE:25]
[MOUNTAIN_CAVE_MIN:6]
[NON_MOUNTAIN_CAVE_MIN:12]
[ALL_CAVES_VISIBLE:0]
[SHOW_EMBARK_TUNNEL:2]
[TOTAL_CIV_NUMBER:25]
[TOTAL_CIV_POPULATION:15000]
[SITE_CAP:264]
[PLAYABLE_CIVILIZATION_REQUIRED:1]
[ELEVATION_RANGES:100:500:500]
[RAIN_RANGES:100:200:100]
[DRAINAGE_RANGES:100:200:100]
[SAVAGERY_RANGES:50:200:50]
[VOLCANISM_RANGES:150:300:150]

Sample world (Teyo Oroni)