I've owned many singles, quite a few 180° (and one 360°) parallel twins, 7 inline transverse fours, 2 horizontally opposed fours, two 90° V-fours and 2 inline transverse sixes and have loved them all for their purposes. I currently own 3 180° parallel twins and one inline transverse 4 cylinder. I'll probably only keep 3 bikes total after I get around to the full patina '69 CB350 project (engine overhaul, catching up minor maintenance). Once it's done I'll probably sell it, I just got it cheap ($400) and it's all original. I loved my XL250 back in the day, so much fun to ride. If I could have one of them back it would be the CBX, probably the coolest and most fun engine I've ever owned.