I did Aikido for just over 10 years, and have dabbled with a few others, including muay thai, TKD and JKD.
I looked seriously at taking up Krav, but unless you learn it properly (including the instinctual hard reactions) it is not that much more effective than anything else. Part of what makes Krav so effective as a combat art is the nature of the responses, and if you aren't learning those properly, you're not really learning Krav Maga, you're learning based on it, but nowhere near as effective.
would you say that the aikido you learnt was 100% original and classic aikido as the founder system that was developed or a slight variation and adaptation of it ?
although krav is most effective in its true form it does not mean that it does not have a place for civilian use and self defence