It depends on what you like. I'd say for a starter gecko get a leopard gecko or a crested gecko. Both are fairly easy to care for. I have found that ceasted geckos tend to be tamer then leo's though. My 2 crested gecko have never bitten me, where as my leo's have bitten me. I can't speak for an other gecko's though. I also like my beared dragon too, but they need a bit more care. All in all for a first gecko I'd say crested.
1.1 crested gecko ( cresty and sticky!)
0.0.1 crested baby
0.0.1 Mali Uro (Spike)