The darker emotions are fine. Do you control or choose what you feel? No. Feelings are mostly just automatic reactions to certain stimuli. It depends on what you do with them. The Bible says, "be angry and sin not." In other words, go ahead and get angry. Be sad. Feel it! But don't do anything stupid with that. Don't go and kill the guy you're angry at. Deal with your emotions, understand them. If you don't like feeling a certain way, maybe that's your body/subconscious trying to get you do recognize or deal with something.
Interesting side note: It wouldn't necessarily be wrong for God to be jealous, angry, etc. It's often wrong for us because we injure others, but if God made us all, He's got the right. If God is truly a God of love, then even in his anger he's got our best interests at heart. (Again, not wording it well, but I think you'll get what I'm saying.)