I’ve been on Seroquel for 4 yrs with no weight gain. I like it - it keeps the chatter in my head down to a low dull roar.
Lamictal was like eating sugar pills - no effect at all.
Abilify was activating - I did not do well on it at all.
Epilim has caused me weight gain but because it’s the only thing that has any impact on my mixed moods (usually actively suicidal) I persevere with it.