While text objects are a fantastic feature, I always found that many of them are a bit slow to type.
1da}
2ci"
3daW
With the exception of iw/aw (a word) and is/as (a sentence), text object commands take up three keystrokes, one of them being on the number row and requiring shift as additional modifier. I personally follow the philosophy that a keymap's distance to the home row (and the number of modifier keys needed) should correlate with the frequency with which you use it. All things being equal, commands should be close to the home row and not require any modifiers.
Interestingly, there in one notable exception in vim, namely the bracket text object ab / ib. Basically, ab and ib are synonyms for a) and i), but without the need to press a shift, and one row closer to the home row. And even though a) is easier to remember at first due to the second character literally being a bracket, "b" is actually a solid mnemonic for "bracket". So why create such mappings for the other text objects as well?
1vim.keymap.set("o", "ar", "a]") -- [r]ectangular bracket
2vim.keymap.set("o", "ac", "a}") -- [c]urly brace
3vim.keymap.set("o", "am", "aW") -- [m]assive word
4vim.keymap.set("o", "aq", 'a"') -- [q]uote
5vim.keymap.set("o", "az", "a'") -- [z]ingle quote
Granted, some of the mnemonics are a bit odd, but for me they work nonetheless.