Shut Up Legs
Down Under Member
I agree: climbing hills is great fun! The only purpose of the downhill bits is so you can start the next climb .Let's get a popular misconception out of the way, staying seated is not always more efficient than standing. The following will affect which method you use:
Technique - critical and oft dismissed by non specialist climbers.
Fitness / Physical ability / weight of rider v bike
Type of bike / bike fit / gearing - you would think a given but you would be surprised.
Gradient
Speed of climb
Mental attitude
Not an exhaustive list, lots of minor stuff that will affect climbing such as tyre pressure, particularly in front tyre if standing. A hybrid bike is not ideal for standing because of hand position, bull bars will help with this.
Climbing hills is an art, one of the most enjoyable things about riding a bike, IMO of course.......
As for climbing technique: I'll stand up in the saddle for short climbs, but for longer ones I'll mostly remain seated, but stand up for short periods just to give my rear a break. To help maintain climbing momentum, it's good to continue pedaling while switching between sitting and standing positions - this can initially be a bit harsh on your quadriceps, but you get used to it. It also helps to have your back as upright as possible when climbing, otherwise the longer climbs may cause lower back pain.
The above is just my unexpert opinion, derived from numerous climbs up mountains , of which the state of Victoria in Australia has numerous good examples.