I quite fancy a custom steel or titanium 29+ hardtail with a Pinion. Looked into it a few times, but can’t justify the cost.
Otherwise, after being a serial bike swappwr for many years, I’m quite settled in my bikes now…
29+ singlespeed (Surly Krampus) ✓
Stooge (Mk4) ✓
Steel LLS hardtail (Ragley Bluepig) ✓
Steel gravel/monster cross (Genesis Vagabond) ✓