i used to dislike using "complex' as adj., then found it used so often that way. but i don't know any difference betwwen them...

btw, how many of you pronounce

often as o-f-ten, i found most americans i noticed saying that way, but i say o-fen as i learned from school in china.

and

data: dei-ta or dai-ta, i say dei but i heard many natives sound like dai

and...

how amny of you still say spinach as spi-na-ch