Keeping site preferences on a per user basis may consume a lot of resources, but I would like to know how exactly the staff behind SE sees this. Currently, apart from favourite/ignored tags there are no options to customize your personal experience on SE sites.
On the one hand, I am impressed that such a big web application can go without settings, but on the other hand such a web application may benefit from them greatly.
I ask this question because there have been discussions about feature requests before that some people liked, but others didn't. Some of these could have been implemented as preferences.
For example, whatever the tab key does in the editor when asking/writing a question: some users prefer the default behaviour, others may want it to insert 4 spaces.
I like the fact that great effort is put into finding the best settings for the majority of users, but eventually it's impossible to suit everyone's tastes.
What are your opinions on individual preferences?