I'm wondering what the last feat of my character should be...

[dehro]

I'm building a charging goliath barbarian/fighter.
feat progression is as follows:
1 barbarian1 Power attack, Pounce,
2 fighter1 cleave
3 barbarian2 exotic weapon proficiency: spiked chain
4 fighter2 Improved initiative
5 barbarian3
6 fighter3 improved bull rush
7 barbarian4
8 fighter4 weapon focus
9 barbarian5 Great cleave
10 fighter5
11 barbarian6
12 fighter6 Leap Attack, shock trooper
13 barbarian7
14 fighter7
15 barbarian8 Combat reflexes
16 fighter8

I'm missing the last feat and am considering a bunch of options: Iron Will (I have rather poor will save but I'm not sure a +2 will make the difference at this level)? endurance (with an eye towards steadfast determination)? blind fight? Improved critical? Lightning Reflexes? Track? weapon specialisation?
something from one of the "complete" range of manuals?

I don't really have much in the way of a plan going forward into development of the character, so maybe something that points me in that direction?

yes, I know that the character is nowhere near as optimised as it could have been, but I'm ok with that and won't be retraining any feats any time soon if I don't need it absolutely for some prestige class I have yet to pick.
other than that, any suggestion/opinion is welcome

[OldTrees1]

Knockback (same book as Goliath) lets you knock away enemies you hit with an attack (attacks of opportunity included).

[noce]

A simple choice would be weapon specialization, followed by melee weapon mastery.
With two feats you get +4 damage and +2 attack bonus.

[NevinPL]

Toughness :D

Flay Foe (CoR) ?
Gruesome Finish (EoE) ?
Power Critical (CW) ?

[Darrin]

Sourcebooks available? Online content ok? Dragon Magazine? Tome of Battle?

Also, what race? Headlong Rush is another x2 damage multiplier, but is orc-only.

[dehro]

Sourcebooks available? Online content ok? Dragon Magazine? Tome of Battle?

Also, what race? Headlong Rush is another x2 damage multiplier, but is orc-only.

Race is Goliath, as per OP. As for the sources, apologies, I should have specified...
The only available sources are the core books +PH2 and the core books and the "complete" series. We use a small "point buy system" during character creation, which allows me to pick things from other sources spending points each time you do, but I spent those points buying the race and the substitution levels.
There is a chance which I must verify, that I may pick from other sources once the game is running, but this may also be banned. In other words, I may picked an "allowed" feat now in preparation for picking another feat later, only for the second feat to be denied to me in a few levels time...

[Keld Denar]

Mad Foam Rager. Beyond the cool sounding name, allows you to ignore bad stuff for one extra round so you can proceed with the face smashing.

[OldTrees1]

Race is Goliath, as per OP. As for the sources, apologies, I should have specified...
The only available sources are the core books +PH2 and the core books and the "complete" series. We use a small "point buy system" during character creation, which allows me to pick things from other sources spending points each time you do, but I spent those points buying the race and the substitution levels.
There is a chance which I must verify, that I may pick from other sources once the game is running, but this may also be banned. In other words, I may picked an "allowed" feat now in preparation for picking another feat later, only for the second feat to be denied to me in a few levels time...

Ah, so despite having a Race from Races of Stone, you can't select a feat from Races of Stone for this level.

What about Extra Rage or Extend Rage from Complete Warrior? They give you +2 Rages/day or +5 rounds per rage. That would put your Mountain Rage to 5/day (3+Con rounds) or 3/day (8+Con rounds).

[Pugwampy]

Why not the best feat in the whole world ? 3.5 Book of Erotic fantasy .

Chaste Life +2 AB

nuff said