I think they are awesome and ought to be praised. They put much money in the game industry and help several console manufacturers to prosper, not only one of them. Even better if they buy many games, too... they don't even have to play them: every gamer profits from a healthy game industry, so these whales are very important and should be praised. So praise the god gamers... NOW! ;)
Joking aside... apart from the higher hardware costs (which are laughable compared to many other hobbies) I don't see many downsides of owning and using several systems instead of one or two:
- you can cherry-pick the best games and are never forced to play mediocre games (there are never gaming droughts)
- without gaming droughts, the urge to buy most games day one is small (so higher hardware costs can reduce software costs)
- more opportunities to get great software deals
- you can choose the best version of a game
- if the version differences of a game are neglectable, you can choose the cheaper version
- if one service (PSN, XBL, Nintendo Network, Steam, Battlenet...) is down, you can play something else on another system
- even if one system/company is your favorite, the chances of you sour-grapes-bashing the rest get much slimmer
- if each system gets less operating hours, it can prolong their lifespan (my 360 had its RROD after 6 years, my launch-PS3 still runs fine)










