I couldn't possibly limit my list to just 3; it would just be so unfair to the other spells that so richly deserve my scorn.

So I'll just make mention of one, quite possibly peculiar to me, that hasn't come up yet:
Shadow Blade. I dislike the spell because, IMO, one spell known is much too cheap a price to pay for acquiring credible (if not top-notch) melee capability. In more general terms, I do not like the creep toward making wizards (or any other caster) a 'universal class' that is able to emulate other classes via modest investments in spell selection. I don't have a fundamental problem with building, e.g., a magical tank from a wizard, but the price needs to be much, much steeper than a few spells known. Admittedly, we're not quite there yet, but to me it feels like we are well down the slippery slope.