Here's a few of the seeds I've found while looking for interesting worlds with good start conditions. Spawns are sometimes approximate (based on the start chest). All coordinates are in X and Z only.
When my daughter first shared Minecraft with me, we randomly typed "Mom" as our seed.
The result was bryce-lkike mesa biome with a couple towns not too far away.
Spawn: 3.5, 7.5
Villages: (100, -220) and (-160, -219)
Unlike Mom, the seed Daddy turned out to be a really hard world.
"Daddy" is an amazon-like jungle that stretches on and on. If you feel like getting in touch with your inner Tarzan, this is the world
for you. There were several nice Jungle Temples though that made this world actually possible.
Spawn: 221, 293.5
Temples: (-170, 205), (132,10) and (551, 724 - also a break in the jungle biome)
So the "Amazon" seed is not a jungle river, it's Tiaga with nice mossy stone near Extreme Hills and Plains. There are a couple convenient villages.
Spawn: 75, 244.5
Villages: (-235, 179) and (-157, 708)
This seed was too ironic to pass up sharing; "wonderland" (not capitalized) has a very deep chasm right at the edge of a Roofed Forest biome. The "rabbit hole" actually goes to Level Y10 and is just to the south of the spawn point(right accross the small river).
Spawn: 141.5, 300.5
Wanderland has a very nice combination of biomes with lots of horses near the spawn point and a village just a short way away to the west. There's also a second village a little farther away.
Spawn: approximate: 228, 258
Villages: (130, 264) and (320, 840)
Uncannily accurate at the spawn, but there are a few points of interest that make this scrub inhabitable; a village and a desert temple are within a reasonable distance.
Spawn: -260, 215
Village: (-157, -222)
Temple: (-429, 579)
The "Wild" seed is remarkable for the number of different biomes within a very small area. As you can see from the picture, plains, birch forest, desert, swamp, roofed forest and extreme hills are all spitting distance. It is mostly wild though - I only found one village.
Spawn: -256, 253
Village: (96, 765)
Three villages, two of which lay very close to the spawn point, make this picturesque world very playable. No shortage of wood or llamas.
Spawn: 87.5, 222.5
Villages: (-15, 201), (-80, -219) and (513, 349)
There is a lot going on in this world, with three villages, a temple and lots of stepped and open crevasses.
Spawn: 56.5, 246
Villages: (95, 260), (116, 710) and (-167, --156)
Temple: (155, -290)
Crevasse area: ~ (227, 787)
Just a gorgeous world filled with rollng sunflower plains next to flower forests and extreme hills. I found two villages, one very near the spawn.
Spawn: 245.5, 252
Villages: (219, 383) and (585, -167)