Cryptocurrency Wallet Seed - mental backup?
Uninstalling the wallet will not make anything more secure. Deleting the wallet also does not guarantee that the wallet file is gone; it is usually still on disk for some time after it has been "deleted". You will be exposing your seed to a computer anyways any time you want to send Bitcoin and get new addresses to be receiving Bitcoin at. By only remembering your seed, you may be a little bit safer than if you had let the wallet do its thing (where it encrypts the wallet file and is still on your computer). I don't think you will actually a significantly more secure. All you are doing is just increasing the risk that you lose all of your coins (by forgetting the seed) and making it more of a hassle to send and receive Bitcoin.


  And I won't have any issues using the seed with other wallet when I choose to use my cryptos?


Not all seeds will work with other wallets or altcoin wallets. It depends on how addresses are derived, what standard the seed follows, etc.