I like that the platform is fast and easy to setup, has integration with hardware wallets, has been around for a long time (since 2011). One of the best features of Electrum is that it does not download the entire Blockchain, making it very lightweight. It uses servers to collect the information and so saves lot of memory. It is end to end protected wallet which is encrypted, so there is no way for stealing your Bitcoins. The private key generated for encryption are used from the seed itself which is stored in the Desktop, which would save the data from being lost. As it does not download the information from Blockchain, it would be much faster to perform the transactions. As the passwords and other data is not stored on the server, it would be much secure as it would not be easy to steal the information from the desktop. Electrum is written in Python, which is much easier and shorter to review the coding and review the work. It can sign the transactions and verify the messages offline from where it can import and export the private keys. There are some other advanced features also available but where one needs to know the command language.

I like it because it's simple to use and user-friendly

The simplicity of its usage attracts me to this wallet. A user just has to remember their 'random set of words' or the code that they basically get when they start using the Electrum wallet and in case if they lose their laptop or hard drive or any other connected device, user can easily recover all the data securely by installing the electrum wallet using their unique code or the random set of words.