What is your favourite DBMS and why?

Answer 1

I've always had strong affinity towards Databases and the field of Data Science.
Firstly, databases are present everywhere. In every web application, website, android application, networking application, game application, etc. you need databases. There does not exist a single field of computer science where databases are not used.
During my second year, the subject of Database Management Systems (DBMS)amazed me a lot. I liked the concepts of normalization, integrity constraints, primary key, triggers, etc, to name a few. The concepts seemed very interesting to me over boring theory subjects. I also liked Transaction Management and especially in that topic, Deadlock Management.
Further, I learnt SQL. Selecting a particular kind of data which is to be needed from a large set of databases was always an enthusiastic task. Firing queries for accessing complex data from different tables is fun. 
Creating table, choosing the primary keys for them, managing the integrity constraints such that the consistency of the database is maintained were other such tasks that I liked. In all my undergrad projects, I always did the part of managing the database :)
Last semester we had Distributed Database Management System (DDBMS) in which the database is fragmented and stored on many sites for efficiency. The concepts in this subject are further interesting :)
@Sololearn

Answer 2

Same as you i think this subject is very interesting and fun 👍👍