The generic process for brewing your own beer is the same regardless of the type of beer. The decision to which beer kit to get is purely dependent on your taste.
Pale ales are hoppy and aromatic. As the alcoholic levels aren't high, it gives a light and refreshing taste, perfect for a warm day, or a chill night. The pale ale is your best bet for a good tasting beer that is appealing to most - perfect for a beer party!
If you like a little sweetness to your beer, then the amber ale is perfect for you. Packed with caramel notes, the amber ale carries a delightful aroma reminiscent of bread and biscuits. To top it off, it has a nice reddish hue. This drink is a fun alternative to the usual options.
Dark beers are a class of their own. It tends to be more malty, drier (higher alcoholic content), yet balanced with some roasted aromas and sweetness. Porters are sweeter and lighter than what you imagine a stout would be, while maintaining the roasted aroma and flavours. If you are adventurous, go for it!