I don't like ASICs
-They gobble up electricity(yes I know they are more efficient pr watt but that doesn't help when they skyrocket the difficulty).
-Creates allot of noise and heat making them less attractive for regular people to mine with at home, thereby causing the blockchain to be less de-centralized.
-If mining on their algo becomes unprofitable then they are basically bricks that will be discarded(GPUs are still useful for mining other algos, or for gaming, and other applications).
-Shitty quality(or so I've read)
-One company basically have monopoly and can threaten security on blockchain.
-Insane price gouging.