I let xbl lapse from 2004-2007, then again from 2008-2013, then just cancelled again recently. It wasn't worth it given how few xbox games I actually played.
I don't miss it at all as I almost never turn on my xbox.
I've had ps+ since they started supporting vita on it and haven't looked back. The sale discounts alone pay for the annual sub, plus it's a platform I use a lot more.
I doubt I'll pay for nintendo online, and will likely just sell splatoon once it's mandatory unless nintendo makes it vastly more appealing. I find the smart phone app pretty half-assed.