Basically, throughout the course of The Simpsons, Homer's gone through a number of personality changes, as I will point out here:
- Ignorant Homer (Season 1 circa 1989-1990) - This is the Homer who's made claims that weren't as thought out as he planned. For instance, being a fisherman or a self-claimed "experienced woodsman". The Homer from Season 1 had been considered to be more of a Walter Matthau-esque clone until his own individual character was finally established a few seasons later.
- Stupid Homer (Seasons 2-5 circa 1990-91 to 1993-94) - This is the Homer who's made such statements as "Trying is the first step toward failure" and "Shut up brain or I'll stab you with a Q-tip!". This is also the same Homer who's been head of the union, a blackjack dealer and the subject of a sexual harassment lawsuit.
- Hare-Brained Homer (seasons 6-11 circa 1995-96 to 1999-00) - This is the Homer who's cooked up such schemes as telemarketing fraud, gaining weight to work at home, and grease hi-jacking. This is also the Homer who's held such jobs as a Krusty wannabe doppelganger, Mayor bodyguard, alcohol bootlegger, and submarine captain.
- Jerkass Homer (seasons 12-14 circa 1999-00 to 2001-02) - This short-lived Homer was rude, insensitive, crude, and just plain moronic. Just re-watch the episode "Alone Again Natura-diddily" to see Jerkass Homer at his finest, unless you've seen "Trash of the Titans".
The current Homer is a cross between Jerkass Homer, Stupid Homer, and Ignorant Homer.