Mines in their current implimentation are pretty uninteresting. However, with a little modding, you can create some cool options.
Shard Mines - bypass armor
Phased Polaron Mines - bypass non-phased shields
Null Space Mines - bypass shields and armor
Time Mines - quad damage to shields
I had thought about some things like doing Allegience Subverter mines and Engine Damaging mines, but they're quirky at best (since mines are strategic and not tactical in nature) and in some cases just don't work.
At least there IS an option to make some more interesting/entertaining mines.
General John