If glamming up only happens a couple of times a year, maybe allocating more time and money on everyday clothes that are more interesting and have the designer details, would be more beneficial.
Start looking at inspiration for the clothes needed not wanted.
Make the first piece & wear it, consider if the fabric is the right type, weight, colour style. How does the garment feel? Is it solving the what to wear dilemma? If yes, make one more, then try another pattern with some different style details or tweak the pattern for a different look.
"When you're on a good thing stick to it"
Sewing becomes a bore when we keep making the same garments in the same colours and same styles.
Mix it up a bit. Limiting the amount of times you make the same styles keeps you fresh and excited to choose something new to wear every day.
Sewing mojo is very precarious.
Imagine if we had only one pattern and one colour choice ... Sounds like a uniform doesn't it.