Maybe I should lurk for a little longer, but I wanted to throw another airframe into the fray-- the Me163 Comet.
"Flight Journal" made a pretty good case for the "worst fighter" prize, given the unstable nature of the peroxide fuel, diversion of resources from other projects, low kill rate, difficulty in landing/take-off, and problems with ground handling.
Still, must have been fun while the fuel lasted, even if you were tempted to bail on short final if the landing didn't shape up well.