I never found Minecraft to have much replay value in singleplayer. I usually get bored of out my mind roughly 20 minutes into a world. Perhaps it's my imagination or something, but I just find it dull. I think the landscape generation has a lot to do with it - it's just not interesting. It has this sick, isotropic "this has been generated procedurally" feel to it, though that's just my opinion.

Also, the lack of anti-aliasing and mipmapping really strains my eyes. I've been waiting a long time for this, but apparently Mojang is not able to add a boolean flag and two lines of code to their pipeline, so you need to download a mod, which requires modloader, which requires some other dependency which only works half the time and breaks with every update (and, no, you can't force it through the device control panel - that trick works for nVidia but AMD doesn't play nice with it). But anyway.

Multiplayer on a good server can be really fun, though, when latency isn't too high.

I bought Minecraft Pocket Edition, and I never really got into it. There's sheep, zombies, and boring building. The programmer art doesn't help either.

me and my friends have a private server, and run tekkit on it, which has given us 10 fold worth to do, i've been building small games with computercraft such as pong/tetris/snake, i'm thinking of trying to do a platformer next,

it was very humorous, i was looking up how to get a random number in lua by googling "lua random", and the first result brought me to this, 6 years ago when i was just starting out, i asked the same question, i disabled personal results and apparently it's listed at the #3 result, still it was quite a blast from the past.