League of Legends: Ping rose from 20-25 to 30-60, this was all right to play with the first week. Week two however, if I have anything running at all -- skype, youtube, twitch, spotify, sometimes even just the game itself -- my ping spikes up to anything over 300 and back down to 20. It makes playing ranked (or even normals) with friends excruciatingly difficult, especially playing ADC.
Diablo 3: I play on NA, I've been going from 160 ping to over 700 and back again intermittently. Not the worst game to lag on, thankfully my character is softcore, so any deaths from spikes don't bother me too much, but sometimes the game will lock up when ping spikes.
Counter Strike: Rubber banding like crazy, ping dependant on servers, but usually get kicked from servers for ping spikes.
Rocket league: Becomes unplayable with spikes.
And lastly -- partially related to gaming -- YouTube has been having buffering issues for a week now. I often have to refresh a video for it to load correctly.