Best Mod for solo play?

[Slick]

My personal recommendation is to learn to play the game unmodded so that you can use that as a basis to see if you enjoy the mods later. Then after you have played using several different styles and racial traits, download the mods of your choice, read their readmes and see if you like them. I can personally say that my first choice was the TDM modpack because it only changes the AI's (adds and makes tougher) and from there the sky is the limit.

Slick.