Speaking of bikes as a hobby for the last ten years my path has been something like buying the first a bit better bike - Bianchi Via Nirone road bike - getting bored with the tarmac roads and buying proper MTB (Trek Fuel EX8), buying the first fat bike for winter practicing (Felt DD30), buying a hybrid for commuting, selling the MTB and buying a new one, selling the fat bike and buying a frame-kit for building a new one, selling the road and hybrid bikes and buying a cyclo-cross as compromise and so on... so that the current fleet consists of:
Cube Stereo HPC140 full-suspension mountain bike; suits very well to our "technical" trails, works on the occasional visits to bike parks and yet light enough for some all-mountain races (have two pair of wheels - original alloy ones as well as DT Swiss XMC1200 CF rims with rather different type of tires - making this very universal at least in my eyes). This is the one most often traveling on the Fiamma bike rack of my California together with a Cube Sting.

Cube Crossrace, not as light & quick as a real road bike but gives the possibility to explore some gravel roads as well (and hopefully starts to work as the commuting tool soon as well).
Salsa Beargrease Carbon: the one to hit the winter trails with (the left one, 3,8x27,5" tires - on the right is a Salsa MukLuk and has 4,8x26" tires, just saying before anyone asks).
