Why I

[XPEH]

Why "I" is always capitalized?

[asil]

Why "I" is always capitalized?

I'd like to think this is out of self-respect 

[Erica Blair]

The answer can be easily found on the Net.

[Mousee]

That's what i found searching the web
The most common theory is that when the old English "Ich" (like in German) became reduced to "I" it was thought to be too small and insignificant to be a real word and could easily get attached to the end or beginning of another word. So scribes and later printers took the habit of capitalising it.