Rhinegold is an exception to this, because it does keep the action moving along, but yes I think you're right. I'd also avoid almost everything post-WWII, if not earlier, when composers decided that tunes were for 'musicals'...

ENO's season includes both their magnificent Magic Flute (the one that got me appreciating opera back in the 80s) and Carmen. Plus one of their wonderful Handel's (ideal for beginners as the lyrics don't matter - this is before composers started using songs to move the plot along - but they're fabulously sung).

In fact, there's only a couple of the fourteen I don't want to see.