The flippin' horrible headwind I had on my journey in to work. In and of itself, very displeasing, as it slowed me down considerably.
But it is making me very very much look forward to the ride home. Assuming the wind doesn't change direction during the day to make it another headwind-struggle...

(Oh, and it's the first time I've cycle-commuted four days in a week. Though I suppose technically I can't say that until I get home, although it'll take something major to make me get the bus or train instead [I dunno, the two-storey car park collapsing and squashing my bike which is in the bike park at ground level, perhap?])