Jailbreaking an iphone.

Been trying a windows phone for last few months and I am probably going to buy the Nexus 5 when it comes out. I'm not exactly the typical iphone buyer. I don't personally like iOS all that much and I find it too restrictive blah blah blah.

BUT The iphone 5/5s is quite a sexy piece of kit. How much can I change an iphone when I jailbreak it? I sorta prefer the look and functionality of android. Also I know iphones get a considerable battery boost from the software and hardware being designed together. The iphone gets a decent battery life despite being small.

So....doable or not worth trying.