I like the winter slightly more than the other seasons.
Mainly because it's got no flies and wasps and all those other annoying bugs, but also because you can jump off tall places without hurting yourself.
Kind of a tie between Spring and Summer and Winter.
Winter has lots of snow, and lots of holidays are in Winter, but snow is only fun for the first few snowfalls. Electrical outages and slippery ice gets annoying after a few months.
During Spring, it's a relief to finally get out of the snow, but there's a lot of stress during school because I have finals, so I don't get outside very often.
Summer is when I'm finally out of school, so I can get outside all I want.
I'll have to go with Summer.
Winter is pretty cool...for a month. All the white snow tends to make people a bit depressed. Not to mention it can easily go below 0 degrees Fahrenheit (which is potentially fatal if your outside for more than 15-20 minutes) for weeks on end.