I don't know if we will have the possibility to set a different theme, as it used to be.
No icons, no smilies, no avatars, incorrect text encoding (and bad translation of older posts), "bad" positions of some links (page number and "previous | next" should be together as it used to be, for example), bad links, no dictionary for posts, bad copyrigth message... I need to be able to change my theme to something that fits my screen (and my eyes).
[EDIT]
Corrected typos and clarified some comments.
[/EDIT]