The Brujah--- If you have to ask, kick yourself, or go read the essay...
The Gangrel--- The Puppies can be good to have around if there are no Brujah availabe and trouble is knocking, but I've never met one that was really worth talking too.
The Toreadore--- I know, I know, the Degenerates aren't even woth mentioning, but I suppose it does present an oppertunity to bash them... These fags aren't worth the energy it takes to kill. I really wish they'd never existed in the first place, but we can't be so lucky, so kiddies, if you ever meet one (and you will, they multiply like bunnies) just kill it and be done with the whole business.
The Tremere--- Sure, magic is cool and all, and Tremere Anarchs are among the best, but you just can't trust 'em. NEVER EVER UNDER ANY SURCUMSTANCES GIVE ONE YOUR BLOOD. And if they try to take it by force, kill 'em.
The Ventrue--- God almighty Venture are pigs. They think they are God's gift to kindred, and if that's so, God has a lot to awnser for. Here's something fun to do... Drop a quarter in the road when you know a Venture will be by soon, then drive really fast at it when you see it coming. The look of "If I bend over, I'll die... is it worth it?" that crosses their faces is just priceless....
The Nosferatu--- Well, they're ugly, stinky, and they know everything. If you really need to know, ask em, but be prepared to pay for it, and never ever TELL themn anything.
The Malkavians--- these guys are either loads of fun, or damned dangerous. Make sure you can tell the difference if you intend to survive knowing one. If they fuck with you, even just a little bit, kill 'em.
Caitiff-- These Kats get even more shit dumped on 'em then we do. I say cut them some slack till they convince you to other wise. I really think Caitiff are the only clan that deserve the benafit of the doubt...
The Assamites--- Assamites are great 'cause they'll do your diry work for you... I love that in a man... but if you see one coming and you didn't call him (which would be a surprise in itself) get ready for the fight of your life.
The Setites--- Setites are good to go to if you need drugs or something, but I don't recomend hanging out with them too often. It's bound to get you into trouble.
The Sabbat--- Yeah, I'm not gonna bother doing the Sabbat clan by clan, since the same rules apply regardless, unless of course they're Brujah... Kill 'em. The masqurade prevents things like the inquisiton... that's a good thing.
Garou--- werewolves are hard to kill, but you generally can't reason with them, so if you plan too meet one, I hope your in good fighting form. Just remeber, silver does work... use lots.