What is your advice for someone debating between B2B or B2C product marketing?

I've had the pleasure of working across both and there are some key differences I'd take into account if you have the opportunity to pick a lane:
-B2B planning cycles are a bit more predictable than B2C ones- i.e. you have a good sense for what the key buying patterns might look like for your product/service, what the key events that reach that audience are and when they happen, etc. I personally found there isn't a ton of reactive planning in the B2B world unless there is a massive competitor shift driving that reactivity, in comparison to B2C which I find to be somewhat unpredictable as there are always new trends you're trying to be relevant for as well as constantly shifting and evolving consumer mindsets.

-In the B2B world, a key audience in addition to your external customer is the internal one - your seller. You need them on board just as must as you need the buyer/customer. And yes the customer journey is often times longer in terms of sales cycles, but the number of key decision-makers/ people you need to influence is usually bigger and therefore more complex.

-Pending the product/service, your budgets might be bigger on the B2C side, especially if you have a decent advertising/above-the-line budget.

I have loved both B2B and B2C - I was pretty hesitant to take a B2B marketing role and I loved it so much more than I ever thought I would. Both experiences are valuable, and you might end up having a preference if you try both. Think about what motivates you most - do you prefer to touch/see/feel your product so you can have a deeper personal connection to it? If you do, B2C might be for you. Or if you know you like being close to the traditional sales model and enjoy relationship building, B2B might be for you.