I’ve come to the conclusion I don’t like spikes at all! I still have them on the bottom of my LS3/5A stands, but as a levelling device rather than through choice. The more I think about it/recall past experiences the more I feel spikes alter the sonic signature of kit for the worse resulting in an unnatural overly dry and mid-forward presentation. A wrong turn IMHO. I’d certainly not be afraid to experiment. Also remember studios almost universally go for decoupling, e.g. foam blocks, rubber feet etc. You’ll hardly ever see a speaker rigidly coupled to anything via spikes in that environment.
PS My Tannoys sit flat on the carpet, they sound great and don’t energise the wood floor, plus I can move them on my own, which I’d not be able to do on spikes or stands. The TV rig has Spendor S3/5R speakers low down either side of the TV on the little tip-back Ikea stands usually seen with the Shahinian Super Elf. Amazing how good they sound, again not coupled to the floor, no boom, really nice clean voice etc and surprising bass weight for such a small speaker. Obviously none of the precise imaging of the LS3/5As upstairs, but these Ikea stands work surprisingly well with a nice sealed-box mini-monitor!