Just for illustration:
You buy the "buy in" feature in Sweet Bonanza slots and the fruits start to drop randomly along with max 100x multipliers in 10 free spins. So with putting $2 in each free spin I got a chance to multiply my $2 to $200 less than 5 minutes. The adrenaline will be high and this is what makes slots so different for both entrainment and house edge means.
But with 99 % probability you will lose all your money. I agreed that adrenaline will be high, but my question is more about
"Will it be higher than in poker or any another game where you need to think"? And here i doubt about the right answer.
It really depends on the preference of each player, while I do not like slots precisely because it is a game in which you do not have to think at all or think about why your opponent is betting the way he does, there are many people that go to the casinos to have a few drinks and to relax and the last thing they want to do is to sit and think about complex strategies and things like that, they only want to pass the time and in that case slots can be a good game for them.