Loktar
Internet God and Defender of Park Benches
I didn't like it when I first saw it, I've come round to it over the years. He could have stopped leaping if he had wanted to, but he knew there were still people who needed his help, so he kept leaping for the rest of his life.
Of course apparently it was originally just going to be a season finale and they added that "never leaped home" bit when the show was cancelled.
They should have said he never leaped home permanently. Al the bartender did hint that Sam could take "sabbaticals" between leaps.