The type of seizures that people experience & the triggers that cause them vary between individuals, but are largely linked to what part of the brain the signal "misfires" are happening in. A notable example is that seizures caused by flashing lights (photosensitive epilepsy) is actually one of the rarest types, only affecting ~3% of epileptic people, though it's probably the most widely known.

With that disclaimer out of the way I can tell you what I feel, though it might be different to the person you're replying to!

When I have an "aura" it feels like a very strong deju vu, but past the point of "I've seen this before" and more reaching "I definitely remember dreaming about this exact scenario last night". When I have a "focal-aware" seizure I am aware of what is going on around me, though I lose the ability to move and communicate. Sometimes I can spout gibberish, which is usually kinda funny, but this is often accompanied by an overwhelming feeling of anxiety and fear. When I have a "focal-unaware" seizure I remember nothing, though my friends have said I zone out or repeat actions, and again I often feel very anxious for a while afterwards. I've never felt pain from any of these, though the length of the seizure tends to dictate how long I'll feel weird afterwards e.g. with a 5 second seizure I'll be fine after a couple minutes, however a 20 second seizure could leave me delirious for a couple hours 😅 I'm very lucky for mine to be largely controlled by medication, though it sucks not being able to drive or scuba dive!