Either I lack discernment or have consistently great taste. When I look over my songlist I have a hard time finding a song that I don't really enjoy singing. I stopped playing & singing for about 20 years so some folks here have more history to base their selection on. Anyway, here's 20+ songs grabbed off a list of 200+ tunes that I do solo:

Any Old Time – J. Rodgers
I'm Gonna Sit Right Down & Write Myself – 1934
Southbound Train – G. Nash
St. James Infirmary –
Magdalena – D. O'Keefe
The Blackbird – Trad
Stormy Weather – Arlen/Koehler; 1943
Good Time Charlie's Got the Blues – D. O'Keefe
River – Joni Mitchell
Goodnight, My Someone – by Meredith Wilson; 1956
Simple Man – Graham Nash
Song for the Asking – Paul Simon
Save The Last Dance For Me – Drifters; 1960
Atchison, Topeka & Santa Fe – Mercer/Warren 1945
Mother Nature's Son – Beatles
All I Know – Jimmy Webb
Careless Love – trad;
Many Rivers To Cross – Jimmy Cliff
Birds – Neil Young
Tupelo Honey – Van Morrison
Kansas City Blues – Jim Jackson; 1928
Across The Universe - Lennon
It Takes a Lot to Laugh, It Takes a Train to Cry – Dylan
My Dear Companion – Jean Ritchie
Whispering Pines – The Band

- Merritt