But if you want to do something a little different

But if you want to do something a little different, there are options. You can go the video route, which asks people to essentially make a toast on camera and then the video is given to the bride and groom later. This isn't a particularly unique idea, but it does solve the issue of not wanting to put people on the spot and still gives everyone a chance to say something special to the bride and groom. Tutorial Taglio Di Capelli Corti
If your guest list includes many outgoing people then consider "pass the microphone". This can work in several ways. You can either be silly with it, or deadly serious. Most people like silly. Say dad takes the microphone first. His last name ends with T (so, let's say dad's last name is Smith). He must find someone whose first name begins with a T (Tom? Tony? Tina? Theresa?) and pass the microphone to that person, who then gives a toast.

This method of giving toasts does put people on the spot (certainly before the fun begins you can warn them so if they are really uncomfortable, they can escape to the restroom or bar) but it can also be a lot of fun. Getting people when they least expect it and then asking them to remember something funny or meaningful about the bride and groom can result in interesting, funny and truthful results.