For me at times, SRP does get boring. But that's for me on lack of passione on what I want to do on the server.
SRP can get fun when you the spark of motivation, you'll have to drive or have that passione in you to make it enjoyable like RPing with someone.
The way I have fun on SRP is RPing a character I like, be creative how they got on karakura and such; being that they are exisiting characters with stuff in the background that I just have to be creative with. (Jodaro Kanjo, sans d. skelton, Freddy Fazwell and many other chars of mine).
SRP gets bore when you just stand around, not really RPing or have the passione to rp. Usually small conversations with dry messages makes the RP not fun, as it's like your forcing yourself to RP with someone. I like having my RP's with detail-RP involved as it makes it fun to read and interact with.