Hmmm, this poll's about as relevant as asking what my favorite air molecule is. And, <font> isn't even html!

All of those tags can be changed through CSS (and should be, to suit your document).

What is the question? What is your favorite structural markup? What is your favorite display markup?

I like <p> because it structurally defines a paragraph? I like <i> because it suggests displaying in italics?

<b style="font-weight: normal; font-style: italic">This is bold</b>
<i style="font-weight: bold;  font-style: normal;">This is italic</i>
[download]

.02

cLive ;-)

Update: ty ChemBoy - Ok, it's valid, but deprecated and not recommended :)

Update 2: since my other reply is nested deeply, let me link to CSS Zen Garden here too.