Guess we just, mostly like to do what is considered correct. Part of me, the superego, maybe, has repeatedly said i shouldn't use the small i, but another part maybe even the other end the Id impulse, instinct says screw convention in this case, pull that ego-I thing back a bit by using th small i. LOL Dunno, but that's my take on it.
It doesn't matter. Look at your own posts. Spellcheck fixes it. The first letter you type after a period will be capitalized. Always.