Well, Miggs, I don't hate ALL East Coast Rap, but as far as what makes some East Coast shit weak--well, one thing that I get sick of after awhile is someone bragging about how bad they are on the mic--an often overused NY topic. Also, sometimes I get the feeling that some East artists use big words because they want to SOUND impressive. They're not saying, "listen to what I have to SAY about this-or-that topic", they're saying, "look how cool I am that I use thousand dollar words. I am so, SO smart!" Also, the beats are often too basic for me--how many times can you freak a loop w/ a drummer who sounds like he's drunk on ten bottles of NyQuil and some repetitious, out-of-tune piano clinking or sore-throated sounding brass/woodwind squealing? Yeah, there's exceptions, but not enough exceptions, IMHO.
Some West Coast artists do get repetitious with the murder shit, but it's easier for me to deal w/ that because at least they're talking about REALITY (and some West cats do so better than others, of course).
Put another way: not everyone can relate to being "the best MC on the mic" (which is what some East Coast cats stress), but ANYONE can relate to having to watch one's back, and doing whatever's needed to protect him/herself (which is what much West Coast street rap stresses--when you get right down to it). Also, ANYONE can relate to the idea that even if you have money NOW, you could lose it tommorow, and you may have to get on the streets and get your hustle on--whatever your "hustle" is--another topic often addressed by many West Coast artists. While some East Coast artists have some thought-provoking shit (Nas, early Mobb Deep, early Wu-Tang, Mos Def, Gang Starr), I find that in general, West Coast rap and its' music stimulates my brain more overall. Just my view, though...
PEACE!