if you feel content then that's fine, from what you say you're not totally starving yourself and the 'right' amount of calories depends on the individual anyway as people have said.
i have no idea how many i normally eat because i never count, but then my eating habits are awful anyway.. recently some days i'll be eating nothing until 6pm, not deliberately but just because i'll be doing stuff and forget, then other days i will eat loads all day! most of the time (i think) i'm a happy medium though and eat 3 straight meals with no snacks in between and a bit of fruit. i don't like calorie counting really, as long as it's balanced i don't really think it matters!