It's very subjective... depending a lot on all factors to do with age, weight, fitness, power and your bike too. On my carbon bike I have a compact 34/25 and at 32yo, 12 stone and 6ft I can't ever ever imagine needing anything lower - on that bike.
On my winter CX bike I have compact apex gearing with a lowest gear of 34/32. The bike is practically twice as heavy as the carbon, especially with a full rack bag, and when I've been touring I've needed the full range. I've even used the lowest gear on a club run this year on a particularly long and steep climb when I wasn't 100%. There's no shame in it.
Put it in terms of a golf handicap - some have a high one and some have a low one, the overall goal being that all abilities can take part.
The point is that you set your bike up in a way that you need to get yourself round the course so that you can take part and enjoy yourself. The more you ride and fitter you get the less you'll need the lower gears but that will come with time and practice. Feeling pressured to ride bikes geared too high and then finding yourself walking up the hills will only knock confidence and enthusiasm.
On my winter CX bike I have compact apex gearing with a lowest gear of 34/32. The bike is practically twice as heavy as the carbon, especially with a full rack bag, and when I've been touring I've needed the full range. I've even used the lowest gear on a club run this year on a particularly long and steep climb when I wasn't 100%. There's no shame in it.
Put it in terms of a golf handicap - some have a high one and some have a low one, the overall goal being that all abilities can take part.
The point is that you set your bike up in a way that you need to get yourself round the course so that you can take part and enjoy yourself. The more you ride and fitter you get the less you'll need the lower gears but that will come with time and practice. Feeling pressured to ride bikes geared too high and then finding yourself walking up the hills will only knock confidence and enthusiasm.