Most of these threads could be reduced easily to a sampling of what the poster his/herself carries; with a few exceptions, of course.
A lot of folks who own .45 ACP, .40 S&W, 9 MM, .357 Magnum etc., will tell you the .380 ACP is useless. They're making themselves feel better about their choice. People who carry .380 ACP all day every day will tell you it's the bee's knees. They're just as wrong.
The truth is, the folks who tell you it is the minimum you should use and is better than nothing are probably giving you the best answer.
Theory in practice: My primary carry is a S&W .357 Model 66-3. My secondary carry is a mid-size .380 (Bersa CC) for throwing in my pocket. It works great with dress pants. I live in the South, where 9 months out of the year, it's hard to conceal a large gun with a tucked in shirt. Folks up North or those in very rural areas don't understand this concept... they don't walk around all day in kakis and a button up shirt, tucked in.
Carry the most you can, but carry often.