I can see a few contexts in which I might expect Cyclops or Kitty to use a chandelier for locomotion or attack. But they are generally few and far between. In many ways, I expect the development of the character's abilities to not make that as attractive an option as it would be for Nightcrawler, Gambit, or Beast.
And if you have a player who frequently goes off character to do this sort of thing, you may have accept that he kind of sucks at that sort of immersion. He may be fun with certain kinds of characters, but if he keeps building more controlled characters and keeps going off his own character narrative, he may be the kind of player a group might not want to invite over.
Or, he might be what is known as an instigator and can be a ton of fun to have in the group because he isn't so hung up on role playing as "serious business". Your group might not want to invite him over, but, generally speaking, he's always welcome at my table.
But, that was my point originally. I wasn't talking about specialized characters who are doing their schtick. Nor was I really talking about characters like, say, Colossus, where swinging from a chandelier is not only pretty darn silly, it's almost outright impossible. I was talking about average characters doing something that is a bit outside of their regular routine, not because it makes sense "in character" to do so, but because the player thinks it would be cool.
Now, different DM's will react to this differently. I've had DM's who will shut this type of play down simply by making any attempt like this fail, or at least have very high probabilities of failure. Which means that the players won't try stunts and whatnot because it almost never works, unless, of course, the character is built with this in mind in the first place. Other DM's roll with it, love the cool factor and are much more willing to gloss over things like "is this really in character" or "is this fitting with my genre" to such a strong degree.
My point was, originally, that given a fairly average situation with a middle of the road DM and player and character, events like this are almost never "in character". From a character standpoint, stunts are last desperate efforts because nothing else is going to save your bacon. From a player standpoint, stunts are cool and should be tried as often as possible. The whole "play outside the box" approach to gaming is generally outside of actor stance. After all, the character is inside the box. The character IS the box. It's the player's attempt to circumvent the box that makes it an out of character action in the first place.
And we applaud players for it. Players that never try anything but what is on the character sheet are boring. We want people to try crazy stuff because that's what gaming stories are made of. No one remembers that hit for 6 points of damage. They do remember when you surfed down the stairs on a shield and plonked two orcs while doing so.

(granted, that particular example was pretty much in character for Leggylass, who had be established as a pretty acrobatic combatant previously. But, without some sort of AEDU framework? Good luck playing that character)
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On the whole spamming powers thing. I suppose my warlock spams his curse power. That's generally the first thing I do any round - but, outside of that, I can't think of a single routine that I constantly follow. I have some powers that will be more effective in certain circumstances (such as a burst power that lets me teleport away and imobilizes enemies - great for when I'm surrounded). But, a rigorous standard proceedure of powers? I can't really see anyone doing it. It's just such an enormously bad idea.