More quirky, semi-prehistoric animals! Aren't you happy? I'm not.
As far as melee characters go, one could do worse. Talking your DM into allowing a wielded weapon shouldn't be hard, and even if that doesn't work, there's mouthpick weapons. However, animal intelligence and 5 RHD cut down on versatility a bit. Still, the damage output is quite large for this level, so I'm playing it safe here and assigning them a +1 LA.
Three animal HD net you great constitution and acceptable strength. Both can then get further boosted by Rage. A burrow speed and Track as a bonus feat add a bit of out-of-combat versatility. All things considered, +0 LA.
High dex, good strength and constitution, large size, fly speed... and a single weak bite attack. I can't really see anyone playing these any time soon: even with mouthpick weapons there's better options out there. -0 LA.
Yes, it's a giant fearsome bear. Yes, it's the poster child for dire animals. But honestly: do you want to spend 12 levels on being moderately good at mauling stuff? -0 LA.
Ferocity is interesting, but a 1st-level spell does the same thing better. The huge strength bonuses and size would make dire boars attractive warrior-types, but they're going to have a very hard time wielding weapons. There's not even a bonus on charge attacks: -0 LA will suffice here.
Stick to lion totem barbarians: the animal itself just isn't worth spending 8 levels on. Grappling is much less useful now that FoM is a thing, and the fact that one will need at least three expensive amulets to make the natural attacks viable isn't working in the lion's favor either. -0 LA.
Do these guys have potential? I think so. The animal HD hurt less now that it's only a single one, and the dexterity bonus and free Weapon Finesse are a nice entry into Rogue. However, when a moderately optimized character can have four of these guys as pets at 1st-level, adding a LA above +0 just seems rude.
18 HD means grappling jumped the shark (hah!) long ago. The relatively low strength (an orc barbarian is far surpassing it by now) isn't helping either. -0 LA (I keep repeating myself here, don't I?).
Hi there, dire-lion-but-bigger. Doubling in HD but increasing the stats only by a fraction of this does not a viable character make. *sigh* -0 LA.
This, at least, is somewhat more interesting. Like the dire rat, these guys have good dexterity, free Weapon Finesse, and good movement. Constitution damage is scarce at these levels, and combined with Attach a dire weasel character should bring something new to the table. I'm tempted to give it a LA, but that's probably just the endless line of worthless animals skewing my norms. +0 LA, I guess.
[insert GoT meme here]
Six RHD net you some admittedly high strength, but that's it. Either dire wolves focus on a subpar bite attack, or they get a Mouthpick weapon and lose their one special attack. -0 LA.
Dire badger II: mushroom mushroom. (jokes are hard, okay?) Seriously: these critters are a lot like their badgerous kin, except bigger, with more strength and a climb speed replacing their borrow speed. It's alright, but not worth a LA over +0.