I want full justification. That's why I need Alf's tools so I can "liberate" and reformat books in Calibre.
If I had to use a very large font (or have a small screen) the large spaces that can appear between words when fully justified probably would annoy me more than they do now that I read on a 6-7" screen. With the font size I use those ugly lines do appear, but not often enough to really bother me.
Bad hyphenations drives me mad though... "Bad" means not to standards suitable for Swedish language. When reading Swedish language books on English orientated devices hyphenation can be horrible! But that's completey OT... Just had to vent. I'm fine now...