If you don't like long straps try something like a Kinderpack. They are brilliant. I have one for my DS2 who is 17 months. I have used it for him since birth. I also have one for my 3 year old!
Please do not base your experience of slings on the baby bjorn. They are crap. I always feel sorry for the parents I see wearing them and want to go up and tell
them about real slings but I don't. 
Just because they are sold everywhere doesn't make them good.
If you want to try a different ones find a sling library close to you. Or go to the natural mamas forums. They have a great buy and sell forum for slings. And good advice too 