That is generally a very good strategy. I have a lot (~50%) of my investments in Target Retirement Plans, though I have put them out about 5 years from my real retirement date, just to keep them a bit more high-return longer since I feel like I can handle that risk.
However, my FIL gave me some great advice 5-6 years ago: Take a little bit, and put it into things you like, to keep investing "fun". In my case I'm doing around 2% in "fun stocks". Personally, it's pretty hard to argue with since my first "fun stock" that I did that with was TSLA, and I got a 20x return on that. My new "fun" set have been other EV and energy stocks, largely, and have generally done quite poorly, a 2-3 of them are down 95+%, but that's over 2 years and my window was more like 5, so time will tell. A handful are up 30-50%. So, some of it depends on your definition of "fun". :-D
However, my FIL gave me some great advice 5-6 years ago: Take a little bit, and put it into things you like, to keep investing "fun". In my case I'm doing around 2% in "fun stocks". Personally, it's pretty hard to argue with since my first "fun stock" that I did that with was TSLA, and I got a 20x return on that. My new "fun" set have been other EV and energy stocks, largely, and have generally done quite poorly, a 2-3 of them are down 95+%, but that's over 2 years and my window was more like 5, so time will tell. A handful are up 30-50%. So, some of it depends on your definition of "fun". :-D