No order, except Butcher was stand out by a long margin:
John Butcher
Dave Collett Trio
Thought Forms the week before Supernormal
Gnod (Bristol)
Faust (Supernormal)
Arditti quartet (especially the Dusapin and Schnittke) (Bath)
An Irish session I found unexpectedly
The guy who plays the kora on the streets.
Piecaitis (Bristol) (Also,
here)
Fresh Milk, quite a few times (Bristol)
Spiderkitten/ Merciless Precision (Bristol)
Slab (Bristol)
Hmm. I'm sure there have been more than that.
Edit: Little Creature, Skjolbat, Non-Ferric Memories, Joined by Wire - that was a great night.
Edit 2: Don't know if it counts, but Dutty Ken DJed at some of the better nights of the year.