Already...I thought long and hard over buying a bike to commute to work on and I'm really enjoying it. I'm enjoying it so much that after a mere six weeks I've already realised that my bike isn't fast enough.So I'm now looking at nice road bikes which seem to whizz past me any my hybrid.Then I go hiking in Kent and I see people on mountain bikes and I think, That looks fun". And I start looking at them too.Is this bike lark somewhat addictive?! And how long should I realistically keep up the hard work on the hybrid until I upgrade? :)"