As has been said ive tried with most spirits (except whisky) and all are nice, but gin does seem to be the ticket, with the sugar definately go for less, you can add more again as has ben said.
One thing that wasnt mentioned is that when you take the liqour off and spereate the fruit from it, you will end up with some slightly sludgy bits after it has settled. Theres nothing wrong with these and they taste good but i rack the liqour and make the trifle base with this. Also use some of the damson for the mincemeat for mince pies so easy and really good.
I mainly make these things up as i go so sorry no recipie i took an edwardian/Victorian one and substituted some of the raisen and cherry for the damson, but if memory serves it was Chopped raisens, dates & damson a little apple and brown sugar, cloves, orange peel and cinamon, little water to moisten then boil softly until it goes like mincemeat - might have used port not water..?
Was good and lasted preserved for a considerable period.