Hi there, I agree with a lot of the suggestions above. Consider the textures, colours and finishes of your furnishings and artwork and think of the pendants as an opportunity to reiterate some of these. So for instance, if you have some black metal in the coffee table legs, you may bring in some of that in the kitchen pendants and look for say glass pendants with black fixtures. Coloured pendants are fun but they can date a lot quicker - bring in colour in the room through artwork, cushions and accessories.

If you want to stay with the Tiffany look you could try to find some small simple ones like these. Otherwise I like the idea of simple glass pendants with an Edison decorative globe.

It's all about proportions, the individual space and how it works. If they are directly above a bench top (or table) you can get away with hanging them a bit lower than normal because you don't have to make sure they're above head cracking height, but if they are above an island you don't want to have to be constantly peering around the pendant lights to talk to someone on the other side.

Hi Jayrees, I totally agree with what Kat had to offer, I would suggest a non geometric pattern on the rug as the floor is already geometric, a light colour and subtle pattern if you prefer a pattern. The mirror should definitely be moved and I would consider a large light print to compliment the new rug and and drapes. It's a pity that the window screen blocks the view (it's a nice view) but the heavy screen is a necessity these days, I would remove the stickers from the glass to help with the openness. Just noticed that you have an air con in the room so you may be able to remove the screen.