what is the most annoying mob of all the time?

Very common early on in gameplay, especially when you don't have a lot of materials with you. Eventually, you'll have enough supplies to mitigate the situation. Maybe after four day cycles, you start building fences and setting up a bunch of torches (or glowstone blocks), and that should take care of creepers from blowing up your house. And if you're really lucky, you might find a jungle biome early on and tame an ocelot.

I usually don't encounter issues with creepers blowing up my house, after a good chunk of time spent on constructing the peripheral of the house. But they are quite an issue underground, especially in dangerous situations near ravines, lava, and other mobs.

 

creepers for sure I don't like them creeping around my creating