I'm pretty much the same as the OP. With very few exceptions (get to those below), no drug experience really feels 'whole' to me unless a cannabis product is in there somewhere. It smooths out the rougher edges of most drugs (for me) while enhancing the good parts.
The only possible exceptions I can think of are salvia (extract) and DMT. When I've smoked salvia extract while stoned, or even combined with weed in the same delivery system, it makes an already-frightening and all-enveloping experience into something even moreso, and there's no real point for that. With DMT, the opposite might be true; weed can interfere and muddle with the 'DMT Flash,' though it adds a character of its own to the experience that some might find pleasurable.