But there are some that are so bad that they instantly give designers the ick.

hey think about its effect, says Lewis.

However, if dont go tearing down your own accept wallpaper just yet.

Bedroom with dark purple accent wall

Andreas von Einsiedel / Getty Images

If done correctly, Lewis admits this look can work.

It comes down to the pattern on the wallpaper as much as anything, he says.

Want more design inspiration?

Living room with floral wallpaper accent wall

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Especially with phrases like ‘live laugh love’ or ‘in this kitchen we dance,’ she says.

It’s just too forced.

Giant clocks that are randomly hung as obvious space-fillers.

in law suite

JohnnyGreig / Getty Images

Typically, it doesnt even work!

Theres just something about it that feels so claustrophobic and awkward, she says.

Working this out calls for proper measuring, which Lewis explains might not be what you think.

bed in a small room against a wall with blue paint

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Unquestionably measure your floor space but not wall to wall, he says.

execute the tape measure from skirting to skirting so you really understand what youre working with.

One of the biggest ick culprits, Lewis says, is a badly sized rug.

Tiny rug in living room with coffee table on top

Liudmila Chernetska / Getty Images

This can lead to a confusing space, as well as functional issues.

These can all majorly affect the overall look if youre not careful.

Ive never really understood them, he says.

Decorated living room

KatarzynaBialasiewicz / Getty Images

I can feel a panic attack coming on just thinking about it.

Of course, if its only for family TV viewing, corner sofas are great.

But Lewis says to think twice if youre opting for one in the name of saving space.

Modern family room with glowing fireplace and grand piano and white shag rug

Michael Robinson / Getty Images

Theyre shocking space guzzlers and highly antisocial.

That alone makes them a major ick.

They look impossible to keep clean!