Flash or HTML? A scratchy question which is being asked since prehistoric ages.

I thought about this too much, especially last few years. Is Flash correct thing to make a website? I've calculated advantages and drawbacks one thousand times. I say last few years because, SEO, blogs, social networking madness are regular parts of our lives. I say last few years because, I used to make Full Flash sites usally. You can think that I hate Flash while reading lines below but I can say boldly I'm an advanced Flash, Flex and ActionScript 3.0 developer. Yes I love Flash but I thought honestly. Actually these are not equivalent technologies bu our goal is to make a website. In short our question is; What is the best technology to make a website? Of course I exclude some technologies such as Java and Shockwave :) Only Flash and HTML/PHP/CSS/JavaScript and maybe MySQL. I'll call second group as HTML shortly to make a goodness to my fingers and keyboard :) ...and there is a third competitor, it's AJAX.