I found that pretty much all of the feats that give +2 to a bunch of skills, or +3 to a single skill, or +2 to a saving throw, or +3 hit points, are generally not worth it, because there are far better feats to take, and in the long run those bonuses are insignificant.

Regarding spells... For wizards they may be ok because more spells never hurt, but for bards and sorcs with their spell limits, these are bad choices:
Hold portal. Detect undead. Burning hands. Magic aura. Animate rope. Erase. Magic weapon. Arcane lock. Obscure object. Darkness. Magic mouth. Misdirection. Phantom trap. Darkvision. Pyrotechnics.