IMHO

/I-M-H-O/

[from SF fandom via USENET; acronym for 'In My Humble Opinion']

"IMHO, mixed-case C names should be avoided, as mistyping something in the wrong case can cause hard-to-detect errors -- and they look too Pascalish anyhow." Also seen in variant forms such as IMNSHO (In My Not-So-Humble Opinion) and IMAO (In My Arrogant Opinion).