If you are looking for a slider based WordPress theme then Flexible is one of the best out there. The theme is sleek in design yet having a ajax based multi media gallery slider at the home page. You can set categories for this slider to appear and it is fully customizable. The colors used in this theme are simply brilliant as they are a bit toned down for that incredible look. However, you can change the colors as per your requirements. The theme has options even to change the fonts. The bets part of this theme is that it doesn’t give a fully tech look and yet not a simple look for a portfolio. It’s like a magazine portfolio kind of a theme. The use of Ajax increases the functionality of theme as when you click any item in the home page, it pops up beautifully providing a great user experience.