Check the corner, not the room
A room can look bright while the corner behind furniture receives very little usable daylight. Check the exact place where the pot will stand at different times of day before choosing a plant.
Corners near radiators, cold glass or a frequently opened door add another constraint. Stable ordinary room conditions are easier on most foliage plants than sharp swings.
Choose a narrow silhouette
A tall plant does not need to be wide to make an impact. Upright forms often leave more visible floor and wall space than a broad, spreading plant of the same height.
Measure the pot footprint and allow room to water, rotate and clean around it. A plant that interrupts a path will soon feel like an obstacle rather than a focal point.
Plan for the next year
Buy for the mature outline, not only the nursery size. A plant can lean toward light, gain leaf spread and need a larger pot over time.
If the corner can only hold a plant at its current size, choose a naturally compact form instead of relying on constant pruning.