Yes you can easily add custom fields to AnsPress form, here is an example (this code is taken from category extension) https://gist.github.com/rahularyan/0b37680c1a24c1e78baf

Will improve category layout in 2.3

Is there any special character in user name ? Can you give me link to your site ?

Hello Zoker, Please update the Tags and category extension as well.

Additional userpro integration would be awesome!

Currently there is no option to change ask page, “question help page” and “answer help page” is help page “guidelines for asking and answering”. I will add a filter to page slug in upcoming version, so that you can override page slugs.