Reg Presley the lead singer of The Troggs is an odd fellow. When Wet Wet Wet
Unlike Wet Wet Wet's bombastic and overproduced version, the original version feels much more pared down with the basic guitars and comparatively slight strings. This brings credence to Reg's claim that he wrote this in 10 minutes, but yet again sometimes the simplest songs can be the most effective.
REM did an acoustic version of the song, interestingly enough the Troggs and REM collaborated on an album together in the early 90's.