Apparently, Texas and Washington D.C. are the only ones who pronounce it "boo-wee" instead of "boh-wee." As the article explains, "Bowie, MD" is pronounced "boo-wee." Also, Jim Bowie's (the knife's designer) last name is supposedly pronounced "boo-wee," though I've even heard it pronounced "boy." But if people want to pronounce it "boh-wee" as in David, I have no objections.
While I say "loyer," I hear "law-yer" quite a bit. Kind of like "nay-ked" and "nekkid" (it's "nay-ked," even if southern-born Justin Timberlake wants you "nekkid by the end of this song").
I have no shame in saying "y'all," though I use "you all" just as much. "You guys" is rare for me. But before one dismisses "y'all" as nothing more than redneck lingo, it might be worth taking into account that it is considered African-American vernacular by linguists (surely no one wants to get slapped with the racist label while making fun of southerners).
When I make the suggestion to "go get a Coke" it could virtually mean anything, even if I literally would be getting a Coke (brand loyalty all the way). I've moved away from it some and tend to say, "Let's get a drink." Oddly enough, many Texans seem to prefer the Waco-born Dr. Pepper to Atlanta's Coca-Cola.