I have played:
Wal -- I own a Pro, have borrowed a Custom in the past & would dearly love a Mk3 five string.
Zon -- borrowed a Legacy Elite & it was ridiculously good, kicked myself when I missed the opportunity to get one.
Status -- currently own a headless S4000, have owned a wooden Series 1, wonderful things.
Spector -- own a Q4, would like to try one of the USA models but my credit card fears for its life
Thunderbird -- well it was bird shaped anyway but not a Gibson, enough to know that it wasn't for me.
Steinberger cricket bat -- I'm sure it was an engineering marvel, but as a playing experience just eww.
Sei -- I owned a Flamboyant 5 string, why why why did I sell it? *kicks self again*
Smith -- I played Kiwi's old BSR5, it was utterly beautiful and I immediately tried to buy one but it didn't work out.
Ricky -- tried one for 10 or 15 minutes, long enough to realise that it was the least comfortable thing I'd ever picked up. Horrible ergonomics.
I haven't played:
Any actual Gibson.
Anything pointy (BC Rich, etc).
Violin bass of any sort.
Any Alembic.
Any Fodera.
Anything fan-fretted.
Anything multi-coursed (8-, 10-, 12-strings, etc.)
Anything with more than 7 strings.