My commuter bike has old fashioned full length mudguards, as i commute every day (no car) they are vital if i don’t want to spend all day with a soggy arse.
I have fender-benders on both my full sussers, invaluable for keeping the crud out of my eyes and away from the fork seals and they are so unobtrusive you forget they are there.
Had trouble with rear guards as i have a marin QUAD link and a Marin QUAD II bike and both are a pain with most guards, especially as i’m so short that they get in the way on owt technical.
I recently bodged a Decathalon guard onto the QUAD II bike by zip-tieing it to the swing arm. Result is a guard that sits close to the wheel, moves with the swing arm, doesn’t get in the way and most of all keeps the crud off my new droppy seatpost 🙂