My cloud of choice for both professional and personal projects. I have a vast amount of experience in several AWS services.
However, due to the sheer number of services on offer I cannot say I'm fully experienced in all of AWS.

Amplify - integration into SPA for auth

API Gateway - custom domains, catchall routing, monitoring

Athena - Glue schema creation, complex Presto queries

Cloudformation - custom resources, cross region dependency chain, AWS CDK

Cognito - integration with user provided SSO providers, auth triggers

DynamoDB - single table (complex) application, triggers, sparse indexing

EC2 - Linux/Windows machines, rolling snapshots

ECS - registry uploads from CI pipelines, lifecycle triggers

IoT Core - automated provisioning, certificate chains, rule actions/triggers

Kinesis - heavy traffic stream processing

Lambda - single API endpoint (NodeJS), custom binary uploads

RDS - MySQL/MariaDB

Route53 - domain management, dynamic routing (health, geo)

S3 - tiered lifecycle, website endpoints, triggers

SQS - fan our queue patterns, standard + FIFO

Step Functions - complex state machines (iteration + sub workflows)

VPC - subnets and forced egress ips for Lambdas