I ride for fitness, enjoyment and an easier, less stressful commute.
On weekends I ride a custom (by Kennedy's Cycle Fit) road bike with Campag gear.
To commute I ride an SE Lager fixed (love the fixie!)
With the family I ride a Shogun hybrid.
I love to tinker with my bikes and won't go to a mechanic unless it's for something advanced or unfamiliar.