Keeping a good relationship with your landlord will always be important. The better you are at being a tenant, the better they are likely to be at being a landlord, and if you nag at them about every little thing and expect them to do things as menial as changing light bulbs, you cannot be surprised if they start being less understanding with you if you cause any damage or are slightly late with your rent.
Furthermore, by being understanding with them and keeping the home clean and tidy, as well as undertaking smaller jobs yourself rather than calling them out for them, you will also find that they are more than happy to help you when there are larger issues that need resolving, whether it happens to be their sole responsibility or not.
Another reason to stay in their good books is the fact that you may well need a reference from your landlord for a future rental, along with the fact that they may well simply look for any reason possible not to give you your deposit back at the end of your tenancy if you have been far from ideal tenants.
As such, it is also worth looking at getting end of tenancy cleaning services in London before you move out to further ensure that they will be happy to give you that glowing reference and return your money without question. Not only will such professional end of tenancy cleaning in London help you to leave the home in the best state and notice any damage that may need repairing before you leave, but it may also help you avoid making simple mistakes that can be easy to make by those who have never undertaken such a major clean before.
So whilst it may seem that your landlord is just there to help you, the more you help them, the better your experience of living in any rented accommodation is likely to be.