I like to start whatever side bot is on(unless I'm mana reliant i.e. fiddlesticks, amumu,etc) so that I get a solid leash. Personally, my favorites for jungle are Wukong, Rek'Sai, Volibear, Xin Zhao, and Hecarim. If you're looking for ones with high sustain I suggest Warwick, Xin Zhao, or Olaf.
As far as the smites go; don't take the white one. It needs some serious buffs to be on par with the others. Blue smite is good for if you want to stick to targets, purple is great if you have sustain problems, red allows you to deal true damage to targets if you are a heavy auto-attacking champ. Its of course up to preference in the end, but its good to look into them and know at least the gist of what they do.
On more tip. Try to keep dragon warded. Don't be shy to give gold for a couple pinks. ;)