Off the peg furniture
Teak and wood furniture has a timeless feel to it and can look good in many types of garden. The other positive about wooden furniture is that it can be bought back to life each year with a high quality oil or a rub down with some sandpaper. Metal furniture tends to be lighter than wood and is easier to move around, especially if used on a deck.
In built furniture
You might not be able to take it with you when move home but having seating or garden furniture built into the landscape ensures it looks like it was always meant to be there and sits harmoniously within its surroundings. Raised borders with wide walls or seating pockets are good way to create informal seating that looks good all year round.