I don't think Feral is all that bad, even with the Monstrous HD requirement. Stat bonuses and Fast Healing 2 are both pretty nice. Though I do think it's less than 100% optimal, my DM is actually really pushing for me to be Feral, as it fits insanely well with the campaign he has in mind. After seeing that monk ACF and noticing how the feats were freed up, plus taking into account the gloves of the balanced hand, I realized something...this build could actually come up with enough feats to incorporate 5 levels of Frenzied Berserker, to get the first Power Attack bonus (and Frenzy, of course).
Monstrous Humanoid 1/LA +1/Barbarian 1/Monk 2/Fighter 1/FoF 1/Fighter 2/FoF 3/Bear Warrior 5/Frenzied Berserker 5
ACF: Chaos Monk (Dragon 335), Overwhelming Attack fighting style (UA, SRD), Lion Totem Barbarian.
1: Extra Rage
1: Hum: Greater Fortitude
Monk:Improved Unarmed
Monk: Power Attack
3: Intimidating Rage
Monk: Improved Bull Rush
Fighter: TWF
6: Leap Attack
Fighter: Shock Trooper
9: Cleave
12: Destructive Rage
15: Multi-Attack
18: Improved Initiative
Picking up Gloves of the Balanced Hand for ITWF, and just skipping out on GTWF.
Any thoughts on this? It's certainly a playable character, it comes into the Shock Trooper/Leap Attack combo by ECL 8, and by the time he gets the Gloves of the Balanced Hand, he'll be making 5 unarmed strikes and 3 natural attacks. When he frenzies and rages, he'll be Large and assuming a starting strength of 18 (+4 for feral) and a belt of giant strength, he'd hit 50 STR unbuffed.