Lava Dome frames. They are exactly the same as Cinder Cone, yet go for less money! Marvellous. I just enjoy ridign them. Yes, they are the XR3 of bikes (used to be everywhere) but nice to ride and no need to worry abut chipping the paint or getting them muddy.
Rigid Singlespeeds - it's amazing how much fun they are, even when you are slower on everything...but at least you spend more time riding!
Oh, and mud. What it's all about - going outdoors and having fun!
Since buying my boardman i'm riding further, faster, and for longer, with less time in the garage building. At age 40 i am enjoying my riding more than ever