Aaaa I was actually thinking about that to? About the pros and cons of this game being randomized, but I didn't mention it because I didn't know your specific vision! And yeah, it's a tough choice. Having it preset allows you to make a lot more of a specific mood for the character. Randomization can help with replayability, but it can be really hard to do without having it be blatantly noticeable. The best in-between I could think of in this case would be having multiple characters you could play as, but then that gets time intensive!!!
Also thats so cute, birds and ferns. I'm just imagining like a little fern just gently lifting up something to you for the surprise party. Like, 'here you go friend', and you can just be pleased at how nice this plant is.
And it's no trouble! This is a cool concept!