The question I get most is whether a rectangular table will make a small room feel tighter than a round one would. It won't, as long as you leave at least three feet of walking space on every side. Rectangular shapes actually read as leaner than round tables of the same seating capacity, because all that length runs along one wall instead of pushing out in every direction.
This shape earns its place in long narrow dining rooms, open plan kitchens where the table doubles as a work surface, and galley style apartments where a round table would eat the only clear path to the kitchen. It suits a house that does breakfast, homework and a laptop on a Tuesday as much as it suits a dinner party on a Saturday, because the straight edges make it easy to pull a chair in anywhere along the length rather than fighting for one of four fixed spots. On finish, I will always push you toward something with a little color or grain rather than a flat white top, because a rectangular table is the biggest flat surface in most rooms and a dull one just sits there. A warm wood tone or a deep painted base in forest green or a rich rust holds its personality for years without feeling like a trend you will regret. If you want proof that color on a big piece works, my mother's dining table is a dusty blue that she painted herself eleven years ago and it still gets a comment every time someone new sits down to eat on it. Around the table, mismatched chairs in two colors look intentional instead of chaotic, and a patterned runner down the center does more for the room than a new rug would.
What really matters with a rectangular table is how it takes the daily damage, because this is the surface that gets candle wax, red wine, a toddler's crayon and a stack of mail every single week. A solid wood or well sealed veneer top wipes clean and the scratches that do show up tend to read as character rather than wear, especially on darker finishes. A table that survives a house move intact, legs and all, without needing new hardware is doing its job. The detail that makes a good one worth living with is a top with a slight overhang past the base, enough that you can tuck your knees under comfortably without clipping a table leg every time you sit down.