what file hosts to be people prefer using for uploading images before embedding into there posts??

you can upload directly into the nexus

just click the "Attach files to this post?" checkbox.

also if you are concerned about safety, i believe you can take a screen-capture of a saved image, none of the EXIF data or other data will carry over (to my knowledge).

trav has made it so its safe to upload pictures. just save the pic to your computer, then click 'attach files to post' then click post, and it will first take you to the upload page

or if your lazy just copy/paste an IMG url into the post