If I use a tab in vi on a unix box then (after submitting to source control which xlates the return characters for OS's) and then check it out to my 2000 box, I have to set whatever editor I use to the same 4 space tab character, otherwise my code can have a tab of sometimes 8 characters. Possibly this has something to do with the checkin/checkout process. Bottom line - I've had to adjust to using spaces for my indentation in order to have the code look the way I want it to on a consistent basis.

When an editor has replaced some spaces with tabs, and some not, then you read it on another editor, the result looks very bad.

I think tabs are most readable, hence, i use tabs

But that's doesn't make tabs evil. It just means an evil editor was used.